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phuong trinh » chuong trinh, cong trinh, huong tran
tren phuong » trien phuong, tran phuong, ren phuong
phan thong » phan thuong, phan hong, phan tong
than thong » than thuong, toan thong, tran thong
sach tren » sach tien, sach tranh
trinh hoa » trinh do, trinh han
khoa than » khoa luan, hoa thai, hoa tan
hoa phan » hoa dan, co phan
sach tin » sach tien, sach kinh, sach han
bai khoa » tai khoa, dai khoa, mai khoa
so sach » so sanh, bo sach, co sach
tu sach » thu sach, su sach, te sach
tin hoc » sinh hoc
hoc bai » hoc dai, hoc giai