Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tranh vat » trinh vat, tranh va, tranh van
dung cong » dung trong
vat dung » van dung, va dung, viet dung
dan phan » doan phan, van phan, dam phan
dan chan » dan gian, dan ca, van chat

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: doi chieu sach - canh tranh vat dung cong ((dan phan) OR (dan chan)) cac~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh vat dung cong ((dan phan) or (dan chan)) cac*.