Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tranh tan » tranh toan, thanh tan, tran tan
dung cong » dung trong
van thanh » ban thanh, van tuan
ho chieu » theo chieu, hoc thieu, doi chieu
tan dung » tran dung, tin dung, van dung
van tan » van tuan, van ban, van tien
van tai » von tai, van tuan

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: ho chieu sach - canh tranh tan dung cong ((((van tan) OR (van thanh))) OR (van tai)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh tranh tan dung cong ((((van tan) or (van thanh))) or (van tai)) cau*.