Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
nhan manh » nhan anh, nhan nhanh, nhan thanh
dung cong » dung trong
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
dan toan » van toan, dan than, manh toan
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 - nhan manh cua dung cong ((dan toan) OR (dan chan)) cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - nhan manh cua dung cong ((dan toan) or (dan chan)) cau*.