K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n\nL\u00f4ng nh\u00ecn chung l\u00e0 s\u1ee3i c\u1ee7a ch\u1ea5t s\u1eebng c\u00f3 trong da \u0111\u1ed9ng v\u1eadt c\u00f3 v\u00fa. C\u00f3 nhi\u1ec1u t\u00ean kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o n\u01a1i n\u00f3 m\u1ecdc.<\/p>\n