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phan trong » pham trong, nhan trong, phan tong
cach khoa » bach khoa, cac khoa, cac khoan
khoa phan » hoa phan, khoa than, khoa phau
hoc thanh » hoc nhanh, hoan thanh, hoc phan
thanh hai » thanh phan, thanh hoa, thanh san
khi phong » thi phuong, thai phong, hai phong
thu sach » tu sach, thuat sach, thuoc sach
sach tai » sach bai, sach tham, sach dao
tai cuoc » tai cuc, lai cuoc, tac cuoc
su sach » so sach, vu sach
nha hoc » nha thuoc, khoa hoc, nha nuoc
hai khi » phai khi, thai khi, hai thi