Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hanh dung » thanh dung, anh dung, hanh dong
nhung don » nhung van, nhung bo
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban

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 - hanh dung luan ((nhung don) or (dung cong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh dung luan ((nhung don) OR (dung cong)) manh toan ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh dung luan ((nhung don) or (dung cong)) manh toan ban*.