\u0110\u1ec1 thi gi\u1eefa k\u00ec 1 m\u00f4n To\u00e1n l\u1edbp 12 n\u0103m 2019 – Chuy\u00ean \u0110H Vinh – C\u00f3 \u0111\u00e1p \u00e1n<\/a><\/blockquote><\/iframe>