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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
phu thong » pho thong, phap thong, khau thong
sach thu » sach thue, sach thieu, sach tham
thu thuc » thuc thuc, thu thuoc, thue thuc
sach thi » sach tai, sach thieu, sach tham
thi phuc » thi phu, thi thuc, thien phuc
phuc dai » phuc lai, phuc tai, hoc dai
dai khoa » da khoa, tai khoa, dac khoa
khoa phu » khoa phau, khoa thu, hoa phu
tu sach » thu sach, su sach, te sach