Theo kh\u1ea3o s\u00e1t kinh nghi\u1ec7m ch\u01a1i l\u00f4 \u0111\u1ec1 c\u1ee7a nh\u1eefng chuy\u00ean gia l\u00e2u n\u0103m cho th\u1ea5y t\u1ef7 l\u1ec7 ra c\u1ee7a nh\u1eefng c\u1ea7u l\u00f4 trong b\u1ea1c nh\u1edb d\u01b0\u1edbi \u0111\u00e2y r\u1ea5t cao, h\u1ea7u nh\u01b0 c\u00f3 d\u1ea5u hi\u1ec7u th\u00ec th\u01b0\u1eddng s\u1ebd ra, v\u00ec th\u1ebf, b\u1ea1n kh\u00f4ng n\u00ean b\u1ecf qua vi\u1ec7c ghi nh\u1edb khi\u1ebfn cho m\u00ecnh c\u00f3 nhi\u1ec1u l\u1ee3i th\u1ebf h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 k\u1ebft h\u1ee3p gi\u1eefa th\u1ed1ng k\u00ea b\u1ea1c nh\u1edb v\u00e0 nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p soi c\u1ea7u kh\u00e1c.<\/p>\n