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thuoc thanh » chuoc thanh, thuc thanh, hoc thanh
thanh khoa » thanh hoa, thanh pho, hang khoa
khoa thong » hoa thong, thoai thong, khoi khong
tac thuoc » tao thuoc, truc thuoc, tac thuong
khoa khoa » hoa khoa, khuan khoa, khoa hoc
bach khoa » anh khoa
pho thong » he thong
sach tac » sach bac, sach tham, sach truc
sach tai » sach bai, sach tham, sach dao
tai truc » dai truc, thi truc, tai trung
khoa pho » khoa phu, khoa phau, khoa hoc
te sach » toc sach
tu sach » thu sach, su sach, tu cach