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thuc doanh » thuc hanh, thuc dan, chuc danh
doanh khoa » toan khoa
than thong » than thuong, toan thong, tran thong
canh khoa » anh khoa, xanh khoa, chinh khoa
khoa than » khoa luan, hoa thai, hoa tan
sach dan » sach danh, sach dao, sach dat
dan thuc » dan toc, am thuc
thu canh » thuc hanh, thu cong, thu ban
su sach » so sach, vu sach
khoa he » hoa he, khoa hoc, khong he
te sach » toc sach
sach ba » sach bai, sach bac, sach bao
ba thu » va thu, ma thu, ca thu