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phai thong » phap thong, phai tuong, phan thong
khoan phai » khong phai, khoa phau, khoan hoi
hoc thong » hoc thuong, hoc trong, hoc hong
hanh khoa » hang khoa, anh khoa, hanh hoa
sach tai » sach bai, sach tham, sach dao
tuc hanh » thuc hanh, tuc thanh, duc hanh
khoa hoc » hoa hoc
sach thi » sach thu, sach thieu, sach tham
thi phuc » thi phu, thi thuc, thien phuc
phuc cac » phuc cam, phuc ca, phuc cham
su sach » so sach, vu sach
tai tuc » thai tuc, tai cuc, tai tu
tu sach » thu sach, te sach, tu cach