Perhaps you should try some spelling variations:
nhung phong » nhung phuong, nhung chong, nung phong
tranh luan » trinh luan, trinh luat, doanh luan
chieu sach » chinh sach, chiet tach, chieu sang
luan nhung » luan chung, luan hung, quan nhung
hieu sach » hieu cach, dien sach, hieu cac
manh toan » thanh toan, anh tuan, tinh toan
anh toan » anh tuan, thanh toan, nganh toan

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (chieu sach)) - canh tranh luan nhung phong ((anh toan) OR (manh toan)) cao~.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (chieu sach)) - canh tranh luan nhung phong ((anh toan) or (manh toan)) cao*.