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thoai trong » thoai thong, ngoai trong, tai trong
khoa thong » hoa thong, thoai thong, pho thong
hoi thoai » hoi khoa, hoi tai, hoi thi
sach thai » sach tham, sac thai, sach tai
thai thuc » thai thuy, thai tuc, tham thuc
thuc cach » thuoc sach, truoc cach, tuc cac
cach hoan » cac khoan, hach toan, sach han
hoan khoa » toan khoa, hoa khoa, han khoa
thu sach » thuat sach, thuoc sach, thu hoach
sach thi » sach thu, sach tai, sach thieu
thi thuc » thi thu, thi thuy, tri thuc
hanh hoi » hanh thoi, hanh noi, hanh hoa
tu sach » su sach, te sach, tu cach