X\u1ec9u ch\u1ee7 l\u00e0 c\u00e1ch g\u1ecdi c\u1ee7a ng\u01b0\u1eddi mi\u1ec1n Nam v\u1ec1 c\u00e1c lo\u1ea1i l\u00f4 \u0111\u1ec1 3 c\u00e0ng, ch\u00ednh l\u00e0 ch\u01a1i 3 s\u1ed1 cu\u1ed1i trong c\u00e1c gi\u1ea3i x\u1ed5 s\u1ed1. C\u00f3 th\u1ec3 hi\u1ec3u b\u00ecnh th\u01b0\u1eddng l\u00e0 l\u00f4 th\u00ec \u0111\u00e1nh 2 s\u1ed1 cu\u1ed1i c\u00f2n x\u1ec9u ch\u1ee7 th\u00ec \u0111\u00e1nh 3 s\u1ed1 cu\u1ed1i. X\u1ec9u ch\u1ee7 \u0111\u01b0\u1ee3c ph\u00e2n l\u00e0m 5 lo\u1ea1i nh\u01b0 sau:<\/p>\n
X\u1ec9u ch\u1ee7 mi\u1ec1n Nam: l\u00e0 lo\u1ea1i h\u00ecnh ch\u01a1i theo 3 s\u1ed1 c\u1ee7a c\u00e1c \u0111\u00e0i mi\u1ec1n Nam.<\/p>\n
X\u1ec9u ch\u1ee7 mi\u1ec1n B\u1eafc: l\u00e0 lo\u1ea1i h\u00ecnh ch\u01a1i theo 3 s\u1ed1 c\u1ee7a KQXS ki\u1ebfn thi\u1ebft mi\u1ec1n B\u1eafc.<\/p>\n
X\u1ec9u ch\u1ee7 \u0111u\u00f4i: l\u00e0 \u0111\u1ec1 3 c\u00e0ng c\u1ee7a m\u00ecnh B\u1eafc, t\u1ee9c \u0111\u00e1nh 3 s\u1ed1 cu\u1ed1i c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t m\u1ed7i \u0111\u00e0i.<\/p>\n
X\u1ec9u ch\u1ee7 \u0111\u1ea7u: l\u00e0 d\u1ef1 \u0111o\u00e1n x\u1ec9u ch\u1ee7 v\u1ec1 \u1edf gi\u1ea3i ch\u1ec9 c\u00f3 3 ch\u1eef s\u1ed1 \u1edf m\u1ed7i \u0111\u00e0i. V\u00ed d\u1ee5 \u0111\u00e1nh gi\u1ea3i 6 \u1edf \u0111\u00e0i mi\u1ec1n B\u1eafc ho\u1eb7c gi\u1ea3i 7 \u1edf \u0111\u00e0i mi\u1ec1n Nam b\u1edfi ch\u00fang ch\u1ec9 c\u00f3 3 gi\u1ea3i c\u00f3 3 ch\u1eef s\u1ed1.<\/p>\n
X\u1ec9u ch\u1ee7 bao l\u00f4: t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u0111\u00e1nh l\u00f4 b\u00ecnh th\u01b0\u1eddng nh\u01b0ng thay v\u00ec l\u00f4 c\u00f3 2 ch\u1eef s\u1ed1 th\u00ec b\u1ea1n \u0111\u00e1nh l\u00f4 c\u00f3 3 ch\u1eef s\u1ed1. V\u00ec v\u1eady, nh\u1eefng gi\u1ea3i nh\u01b0 gi\u1ea3i 7 mi\u1ec1n B\u1eafc ho\u1eb7c gi\u1ea3i 8 mi\u1ec1n Nam \u0111\u1ec1u kh\u00f4ng \u0111\u01b0\u1ee3c t\u00ednh b\u1edfi ch\u00fang ch\u1ec9 c\u00f3 2 ch\u1eef s\u1ed1.<\/p>\n
C\u00e1i t\u00ean x\u1ec9u ch\u1ee7 b\u1eaft ngu\u1ed3n t\u1eeb t\u1ef7 l\u1ec7 \u0103n c\u1ee7a n\u00f3. C\u00f3 nh\u1eefng n\u01a1i \u0103n t\u1eeb 400 \u0111\u1ebfn 972 l\u1ea7n n\u1ebfu \u0111\u00e1nh x\u1ec9u ch\u1ee7 \u0111u\u00f4i. N\u00f3i chung t\u1ef7 l\u1ec7 \u0103n c\u1ee7a x\u1ec9u ch\u1ee7 r\u1ea5t cao n\u00ean kh\u1ea3 n\u0103ng b\u1ecb \u0111\u1ec1n r\u1ea5t nhi\u1ec1u khi\u1ebfn ng\u01b0\u1eddi \u00f4m \u0111\u00f3 b\u1ecb x\u1ec9u. Ng\u01b0\u1eddi \u00f4m th\u00ec th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ch\u1ee7 n\u00ean ng\u01b0\u1eddi ta g\u1ecdi \u0111\u00e1nh l\u00f4 v\u00e0 \u0111\u1ec1 3 c\u00e0ng l\u00e0 x\u1ec9u ch\u1ee7.<\/p>\n