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thoai trong » thoai thong, ngoai trong, tai trong
khoa thoai » hoa thai, hoi thoai, khoa than
tri thanh » thi thanh, tai thanh, tri hanh
thanh cac » hanh cac, thanh bac, thanh ca
sach thai » sach tham, sac thai, sach tai
thai thuc » thai thuy, thai tuc, tham thuc
hai thong » hai thuong, hai phong, hai trong
thu sach » thuat sach, thuoc sach, thu hoach
sach tri » sach tai, sach tren, sach truc
cac khoa » cac khoan, cac khoi, dac khoa
thuc cac » thuc cach, tuc cac, phuc cac
tu sach » su sach, te sach, tu cach
cac thi » cac thoi, cau thi, can thi
thi hai » thi mai, thi hanh