1. C\u00e1ch t\u00ednh \u0103n l\u00f4 \u0111\u1ec1 v\u1edbi b\u1ea3ng exel nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/h2>\n
\n
\u0110\u1ed1i v\u1edbi vi\u1ec7c s\u1eed d\u1ee5ng b\u1ea3ng excel trong l\u00f4 \u0111\u1ec1 ch\u00fang ta c\u00f3 th\u1ec3 chia l\u00e0 l\u00e0m nhi\u1ec1u lo\u1ea1i b\u1ea3ng s\u1eed d\u1ee5ng nh\u01b0 sau:<\/p>\n
- \n
- B\u1ea3ng excel th\u1ed1ng k\u00ea k\u1ebft qu\u1ea3 nhi\u1ec1u ng\u00e0y<\/li>\n
- B\u1ea3ng excel th\u1ed1ng k\u00ea k\u1ebft qu\u1ea3 trong m\u1ed9t ng\u00e0y<\/li>\n
- B\u1ea3ng excel t\u00ednh l\u00f4 \u0111\u1ec1: v\u1edbi k\u1ebft qu\u1ea3 c\u1ee7a ng\u00e0y h\u00f4m tr\u01b0\u1edbc v\u00e0 k\u1ebft qu\u1ea3 trong 1 kho\u1ea3ng th\u1eddi gian.<\/li>\n<\/ul>\n
D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng c\u00e1ch l\u1eadp b\u1ea3ng excel t\u00ednh to\u00e1n trong t\u00ednh b\u1ed9 s\u1ed1 l\u00f4 \u0111\u1ec1 c\u1ee5 th\u1ec3, c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o ngay<\/p>\n
2. C\u00e1ch thi\u1ebft l\u1eadp b\u1ea3ng b\u1ea3ng excel t\u00ednh l\u00f4<\/b><\/h2>\n
B\u1ea5t k\u1ef3 soi c\u1ea7u theo h\u00ecnh th\u1ee9c n\u00e0o b\u1ea1n c\u0169ng c\u1ea7n ph\u1ea3i n\u1eafm trong tay th\u00f4ng tin th\u1ed1ng k\u00ea x\u1ed5 s\u1ed1, do \u0111\u00f3, c\u1ea7n l\u1eadp b\u1ea3ng k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 trong t\u1eebng ng\u00e0y c\u1ee5 th\u1ec3 v\u00e0 b\u1ea3ng th\u1ed1ng k\u00ea x\u1ed5 s\u1ed1 trong nhi\u1ec1u ng\u00e0y li\u1ec1n. Th\u1ed1ng k\u00ea k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 b\u1eb1ng b\u1ea3ng excel gi\u00fap b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u00ecm ki\u1ebfm k\u1ebft qu\u1ea3 l\u00f4 \u0111\u1ec1 trong ng\u00e0y b\u1ea5t k\u1ef3. \u0110\u00e2y c\u00f3 th\u1ec3 coi l\u00e0 ph\u1ea7n m\u1ec1m t\u00ednh l\u00f4 \u0111\u1ec1 b\u1eb1ng excel mi\u1ec5n ph\u00ed kh\u00e1 h\u1eefu \u00edch.<\/p>\n
C\u00e1c m\u1ee5c kh\u00f4ng th\u1ec3 thi\u1ebfu trong b\u1ea3ng k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 b\u1eb1ng excel:<\/p>\n
- \n
- C\u1ed9t ng\u00e0y, th\u00e1ng, n\u0103m<\/li>\n
- C\u1ed9t t\u00e0i, s\u1ec9u, t\u1ed5ng \u0111\u1ec1.<\/li>\n
- C\u1ed9t l\u00f4 v\u1ec1 trong ng\u00e0y (2 s\u1ed1)<\/li>\n
- B\u1ea3ng excel k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 trong ng\u00e0y: Nh\u1eadp \u0111\u1ea7y \u0111\u1ee7 c\u00e1c s\u1ed1 \u0111\u00e3 v\u1ec1, m\u1ed7i c\u1ed9t 1 s\u1ed1, t\u00e1ch ri\u00eang c\u00e1c s\u1ed1 trong c\u00f9ng m\u1ed9t k\u1ebft qu\u1ea3 s\u1eafp x\u1ebfp theo m\u1ed9t d\u00f2ng.<\/li>\n
- B\u1ea3ng excel k\u1ebft qu\u1ea3 l\u00f4: B\u1ea3ng n\u00e0y c\u00f3 27 s\u1ed1 (2 ch\u1eef s\u1ed1), t\u01b0\u01a1ng t\u1ef1 nh\u01b0 tr\u00ean l\u1eadp b\u1ea3ng t\u00e1ch c\u00e1c s\u1ed1 v\u1edbi nhau. T\u1eeb b\u1ea3ng n\u00e0y ta c\u00f3 th\u1ec3 t\u00ednh t\u1ed5ng c\u1ee7a c\u1ea3 gi\u1ea3i b\u1ea5t k\u1ef3 ho\u1eb7c t\u00ednh t\u1ed5ng l\u00f4 \u0111\u1ec1 v\u1ec1 trong ng\u00e0y h\u00f4m \u0111\u00f3.<\/li>\n<\/ul>\n
3. C\u00e1ch t\u00ednh ch\u01a1i l\u00f4 \u0111\u1ec1 b\u1eb1ng excel<\/b><\/h2>\n
C\u00e1ch t\u00ednh l\u00f4 \u0111\u1ec1 si\u00eau chu\u1ea9n v\u1edbi excel nh\u01b0 th\u1ebf n\u00e0o? D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 h\u01b0\u1edbng d\u1eabn khi s\u1eed d\u1ee5ng b\u1ea3ng excel \u0111\u1ec1 t\u00ednh to\u00e1n c\u1ea7u l\u00f4 cho ng\u00e0y h\u00f4m sau:<\/p>\n
C\u00e1ch t\u00ednh l\u00f4 \u0111\u1ec1 b\u1eb1ng excel v\u1edbi b\u1ea3ng th\u1ed1ng k\u00ea k\u1ebft qu\u1ea3 trong nhi\u1ec1u ng\u00e0y<\/strong><\/h3>\n
\u0110\u00e2y l\u00e0 c\u00e1ch t\u00ednh l\u00f4 \u0111\u1ec1 m\u1edbi nh\u1ea5t 2024, gi\u00fap ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 t\u1ef1 t\u00ednh to\u00e1n l\u00f4 \u0111\u1ec1 s\u1ebd v\u1ec1 trong kho\u1ea3ng th\u1eddi gian. C\u00e1ch t\u00ednh nh\u01b0 sau:<\/p>\n
- \n
- Nh\u01b0 \u0111\u00e3 h\u01b0\u1edbng d\u1eabn \u1edf tr\u00ean ta d\u00f9ng h\u00e0m t\u00ecm ki\u1ebfm \u0111\u1ec3 th\u1ed1ng k\u00ea t\u1ed5ng \u0111\u1ec1 v\u1ec1 trong th\u1eddi gian g\u1ea7n \u0111\u00e2y, xem t\u1ea7n su\u1ea5t v\u1ec1 c\u1ee7a c\u00e1c t\u1ed5ng \u0111\u1ec1 l\u00e0 bao nhi\u00eau, sau \u0111\u00f3 t\u00ecm t\u1ed5ng \u0111\u1ec1 v\u1ec1 nhi\u1ec1u nh\u1ea5t \u0111\u1ec3 nu\u00f4i.<\/li>\n
- Xem k\u1ebft qu\u1ea3 trong th\u1eddi gian g\u1ea7n \u0111\u00e2y (kho\u1ea3ng 7 ng\u00e0y ho\u1eb7c 30 ng\u00e0y l\u00e0 \u0111\u1eb9p nh\u1ea5t) th\u00ec l\u00f4 n\u00e0o v\u1ec1 nhi\u1ec1u nh\u1ea5t, \u0111\u00e3 l\u00ean gan ch\u01b0a, n\u1ebfu ch\u01b0a l\u00ean gan th\u00ec ta nu\u00f4i n\u00f3 trong th\u1eddi gian ti\u1ebfp theo.<\/li>\n
- L\u1ea5y t\u1ed5ng v\u1ec1 nhi\u1ec1u nh\u1ea5t trong tu\u1ea7n tr\u01b0\u1edbc \u0111\u1ec3 l\u00e0m c\u1ea7u l\u00f4 \u0111\u00e1nh cho tu\u1ea7n ti\u1ebfp theo.<\/li>\n<\/ul>\n
B\u1ea3ng excel t\u00ednh l\u00f4 \u0111\u1ec1 v\u1edbi k\u1ebft qu\u1ea3 c\u1ee7a ng\u00e0y h\u00f4m tr\u01b0\u1edbc<\/strong><\/h3>\n
<\/em><\/p>\n
B\u1ea3ng excel t\u00ednh l\u00f4 \u0111\u1ec1 v\u1edbi k\u1ebft qu\u1ea3 c\u1ee7a ng\u00e0y h\u00f4m tr\u01b0\u1edbc<\/em><\/p>\n
C\u00e1ch t\u00ednh \u0103n \u0111\u1ec1 s\u1eed d\u1ee5ng b\u1ea3ng k\u1ebft qu\u1ea3 c\u1ee7a ng\u00e0y h\u00f4m tr\u01b0\u1edbc \u0111\u1ec3 t\u00ednh to\u00e1n c\u1ea7u l\u00f4 cho h\u00f4m sau t\u01b0\u01a1ng \u0111\u1ed1i ch\u00ecnh x\u00e1c.<\/p>\n
- \n
- D\u00f9ng h\u00e0m pascal c\u1ed9ng d\u1ed3n c\u00e1c s\u1ed1 c\u1ee7a gi\u1ea3i nh\u1ea5t v\u00e0 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111\u1ebfn 2 s\u1ed1 c\u00f2n l\u1ea1i th\u00ec d\u00f9ng n\u00f3 v\u00e0 s\u1ed1 l\u1ed9n c\u1ee7a n\u00f3 l\u00e0m l\u00f4 \u0111\u00e1nh cho h\u00f4m sau.<\/li>\n
- Th\u1ed1ng k\u00ea xem trong b\u1ea3ng k\u1ebft qu\u1ea3 th\u00ec 2 s\u1ed1 \u0111\u01a1n v\u1ecb n\u00e0o v\u1ec1 nhi\u1ec1u nh\u1ea5t th\u00ec d\u00f9ng c\u1eb7p s\u1ed1 gh\u00e9p l\u1ea1i t\u1eeb n\u00f3 \u0111\u00e1nh cho ng\u00e0y ti\u1ebfp theo.<\/li>\n
- Xem t\u1ed5ng c\u00e1c gi\u1ea3i v\u1ec1 ng\u00e0y h\u00f4m tr\u01b0\u1edbc xem t\u1ed5ng n\u00e0o v\u1ec1 nhi\u1ec1u nh\u1ea5t \u0111\u1ec3 l\u00e0m c\u1ea7u l\u00f4 \u0111\u00e1nh cho ng\u00e0y h\u00f4m sau.<\/li>\n
- Trong b\u1ea3ng l\u00f4 2 s\u1ed1 ki\u1ec3m tra xem c\u00f3 s\u1ed1 n\u00e0o d\u1ea1ng M N M kh\u00f4ng th\u00ec \u0111\u00e1nh MN-NM cho h\u00f4m sau.<\/li>\n
- Ki\u1ec3m tra t\u1ed5ng l\u00f4 v\u1ec1 c\u1ee7a ng\u00e0y h\u00f4m tr\u01b0\u1edbc xem v\u1ec1 t\u1ed5ng n\u00e0o nhi\u1ec1u nh\u1ea5t, \u0111\u00e1nh d\u00e0n l\u00f4 t\u1ed5ng \u0111\u00f3 cho ng\u00e0y ti\u1ebfp theo.<\/li>\n
- Xem trong k\u1ebft qu\u1ea3 gi\u1ea3i 6 v\u00e0 gi\u1ea3i 7 c\u00f3 s\u1ed1 n\u00e0o l\u00e0 b\u00f3ng c\u1ee7a nhau hay kh\u00f4ng, n\u1ebfu c\u00f3 th\u00ec l\u1ea5y l\u00f4 \u0111\u00f3 \u0111\u1ec3 nu\u00f4i \u0111\u00e1nh cho h\u00f4m sau.<\/li>\n<\/ul>\n
V\u1ec1 c\u00e1ch v\u1eadn d\u1ee5ng h\u00e0m c\u1ee5 th\u1ec3 trong c\u00e1ch t\u00ednh b\u1ed9 s\u1ed1 l\u00f4 \u0111\u1ec1 th\u00ec b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u c\u00e1c h\u00e0m t\u1ed5ng, hi\u1ec7u, c\u00e1c h\u00e0m \u0111i\u1ec1u ki\u1ec7n,\u2026 trong exel \u0111\u1ec3 v\u1eadn d\u1ee5ng.<\/p>\n
B\u1ea3ng t\u00ednh l\u00f4 \u0111\u1ec1 b\u1eb1ng excel l\u00e0 m\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 ph\u1ee5c v\u1ee5 t\u00ednh to\u00e1n c\u1ea7u l\u00f4 \u0111\u1ec1 chu\u1ea9n nh\u1ea5t hi\u1ec7n nay, vi\u1ec7c l\u1eadp b\u1ea3ng s\u1ebd gi\u00fap b\u1ea1n tra c\u1ee9u \u0111\u01a1n gi\u1ea3n h\u01a1n v\u00e0 t\u00ednh khoa h\u1ecdc h\u01a1n trong thu\u1eadt to\u00e1n x\u00e1c su\u1ea5t.<\/p>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n
<\/main><\/p>\n
\n\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/h3>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n b\u1ea1ch th\u1ee7 l\u00f4 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n b\u1ea1ch th\u1ee7 l\u00f4 2 nh\u00e1y mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n song th\u1ee7 l\u00f4 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n b\u1ea1ch th\u1ee7 l\u00f4 k\u00e9p mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n song th\u1ee7 l\u00f4 k\u00e9p mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n b\u1ea1ch th\u1ee7 \u0111\u1ec1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n song th\u1ee7 \u0111\u1ec1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n \u0111\u1ec1 4 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n \u0111\u1ec1 6 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n \u0111\u1ec1 8 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n \u0111\u1ec1 10 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n l\u00f4 4 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
<\/h3>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n l\u00f4 6 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n l\u00f4 8 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n l\u00f4 xi\u00ean 2 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n l\u00f4 xi\u00ean 3 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n l\u00f4 xi\u00ean 4 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n 3 c\u00e0ng mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n 3 c\u00e0ng 2 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n d\u00e0n l\u00f4 10 s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n \u0111\u1ec1 \u0111\u1ea7u \u0111u\u00f4i mi\u1ec1n b\u1eafc<\/span><\/strong><\/a><\/h4>\n
<\/h3>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n x\u1ec9u ch\u1ee7 mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n gi\u1ea3i \u0111\u1eb7c bi\u1ec7t mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n gi\u1ea3i 8 mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n bao l\u00f4 mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n c\u1eb7p x\u1ec9u ch\u1ee7 mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n song th\u1ee7 l\u00f4 mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n \u0111\u1ea7u \u0111u\u00f4i gi\u1ea3i 8 mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n \u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n l\u00f4 3 s\u1ed1 mi\u1ec1n nam<\/span><\/strong><\/a><\/h4>\n
<\/h3>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n x\u1ec9u ch\u1ee7 mi\u1ec1n trung<\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n gi\u1ea3i \u0111\u1eb7c bi\u1ec7t mi\u1ec1n trung<\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto c\u1ea7u to si\u00eau chu\u1ea9n nh\u1ea5t gi\u1ea3i 8 mi\u1ec1n trung<\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n bao l\u00f4 mi\u1ec1n trung<\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n c\u1eb7p x\u1ec9u ch\u1ee7 mi\u1ec1n trung<\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n song th\u1ee7 l\u00f4 mi\u1ec1n trung<\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n \u0111\u1ea7u \u0111u\u00f4i gi\u1ea3i 8 mi\u1ec1n trung<\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n \u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t mi\u1ec1n trung<\/strong><\/a><\/h4>\n
\u00a0ch\u1ed1t s\u1ed1 loto t\u01b0 v\u1ea5n l\u00f4 3 s\u1ed1 mi\u1ec1n trung<\/strong><\/a><\/h4>\n","protected":false},"excerpt":{"rendered":"
C\u00e1ch t\u00ednh l\u00f4 \u0111\u1ec1 m\u1edbi nh\u1ea5t, ch\u01a1i \u0103n l\u00f4 \u0111\u1ec1 b\u1eb1ng excel si\u00eau chu\u1ea9n<\/p>\n","protected":false},"author":1,"featured_media":17371,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[375],"tags":[437,438,435,436],"yoast_head":"\n
c\u00e1ch t\u00ednh l\u00f4 \u0111\u1ec1 m\u1edbi nh\u1ea5t, ch\u01a1i \u0103n l\u00f4 \u0111\u1ec1 b\u1eb1ng excel si\u00eau chu\u1ea9n<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n\n\n\n\t\n\t\n\t\n