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than tieng » phan tieng, toan tieng, thang gieng
nguoi sach » nguoi san, nuoc sach
tai nguoi » tay nguoi, tac nguoi, loai nguoi
sach khoa » bach khoa, sach nha, anh khoa
khoa than » khoa luan, hoa thai, hoa tan
sach truc » cach thuc, sach tren, sach thu
pho thong » he thong
sach tai » sach bai, sach tham, sach dao
truc hoc » trac hoc, tru hoc, truc hoa
sinh nha » sinh kha, hinh nha, sinh thai
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nha pho » nha tho, nha khoa, nghe pho