chinh xac
bai viet rat hay nhung cong san lam sao ma hieu duoc ...
vi chung toan la THAY day hoc, toan la tien si...
moi lan chung mo mieng thi lam cho moi nguoi phai DAO MA CHA cua chung de ma chui
nhung con nguoi do thi chi khi nao THAY MAU cho ho thi bai viet nay ho moi hieu
cam on ban da chia se
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