Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh dang » hanh dong, anh dang, hanh dung
hung cong » nhung cong, hung cuong, phung cong
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
dang van » hoang van, hang va
van hung » van dung, manh hung, van duong
dan toan » van toan, dan than, xuan toan

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 - hanh dang van hung cong ((dan toan) OR (manh toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh dang van hung cong ((dan toan) or (manh toan)) cau*.