\u0110\u1ea1i h\u1ecdc B\u00e1ch khoa H\u00e0 N\u1ed9i c\u00f4ng b\u1ed1 \u0111\u1ec1 c\u01b0\u01a1ng v\u00e0 v\u00ed d\u1ee5 minh h\u1ecda<\/a><\/blockquote><\/iframe>