Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
chieu sach » chinh sach, chiet tach, chieu sang
luan cuong » luan cong, luan luong, xuan cuong
cuong dung » tuong duong, ung dung, thong dung
dung thanh » duong thanh, dong thanh, dang thanh
dien sach » dien anh
phi dau » phan dau
pho da » pho ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sach) or (dien sach)) - canh tranh luan cuong dung thanh ((phi dau) or (pho da))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (dien sach)) - canh tranh luan cuong dung thanh ((phi dau) OR (pho da)).
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sach) or (dien sach)) - canh tranh luan cuong dung thanh ((phi dau) or (pho da))*.