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doanh khoa » toan khoa
khoa thong » hoa thong, thoai thong, pho thong
phan thong » phan thuong, phan hong, phan tong
khoa khoa » hoa khoa, khuan khoa, khoa hoc
khoa phan » hoa phan, khoa than, khoa phau
nha thuc » nhan thuc, nha thuoc, nham thuc
sach tai » sach bai, sach tham, sach dao
dan khoa » dang khoa, da khoa, san khoa
so sach » so sanh, bo sach, co sach
tai cua » thai cua, tai cuc, tri cua
cua dan » cua dang, cua ban, ca dan