Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
tranh luan » trinh luan, trinh luat, doanh luan
cong thanh » dong thanh, cong trinh, cong tan
thanh phan » thanh pho, thanh san, thanh toan
van cong » van dong, van phong, phan cong
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chiet tach)) - canh tranh luan van cong thanh phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chiet tach)) - canh tranh luan van cong thanh phan dau*.