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nganh hoa » thanh hoa, khanh hoa, danh hoa
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
cach hoc » cach thuc, cach thoi, dich hoc
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, hoa hoc
te cach » ve cach, te sach, tu cach
hoi van » hoi va, hoi dan, hai van
hoc xa » hoc ma
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