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nghiep cau » nghiep cay, nghiep can, nghiep chan
gian dan » gian lang
van gian » van giang, dan gian, van giao
cau toan » cuu toan, cau hoang, cau thang
hoc toan » hoc tan, hoa toan, hoc than
sach doi » sach hoi, sach moi, sach dao
thai van » thi van, thanh van, thai vung
hop toan » hop hoan, phap toan, tap toan
khoa hoc » hoa hoc
xa thai » ca thai, a thai, da thai
vu sach » vu bach, su sach, vu khach
doi tai » hoi tai, dai tai, doi tac
hoc xa » hoc ma