Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tranh van » tran van, trinh van, thanh van
bang cong » dang cong, bang song, hang cong
dung cong » dung trong
doan phan » doanh phan, toan phan, dan phan
phan cau » phan dau, phan cac, phan tu

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 - canh tranh van ((bang cong) or (dung cong)) doan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh tranh van ((bang cong) OR (dung cong)) doan phan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh van ((bang cong) or (dung cong)) doan phan cau*.