T\u1eeb 5-6 \u0111i\u1ec3m to\u00e1n mu\u1ed1n l\u00ean 8 \u0111i\u1ec3m th\u00ec b\u1eaft \u0111\u1ea7u \u00f4n t\u1eadp nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/blockquote><\/iframe>