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thuc doanh » thuc hanh, thuc dan, chuc danh
doanh khoa » toan khoa
khoa thong » hoa thong, thoai thong, pho thong
thoi thuoc » phoi thuoc, choi thuc, hoc thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
khoa khoa » hoa khoa, khuan khoa, khoa hoc
sach khoa » bach khoa, sach nha, anh khoa
sach dai » sach dao, sach bai, sach dat
dai thuc » dan thuc, dai thu, dai thua
cac thoi » cac toi, cac hop, cac tro
tu sach » thu sach, su sach, te sach
khoa he » hoa he, khoa hoc, khong he
te cac » tu cac, ve cac, te cao