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thoai trong » thoai thong, ngoai trong, tai trong
khoa thoai » hoa thai, hoi thoai, khoa than
hanh khoa » hang khoa, anh khoa, hanh hoa
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
pho thong » he thong
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
khoa pho » khoa phu, khoa khoa, khoa phau
so sach » so sanh, bo sach, co sach
tu cach » tu cac
cach co » cach con, cac co, cach noi
co thuc » do thuc, co thua, mo thuc