Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
doi chieu » doc hieu, doi chi, ho chieu
manh hung » anh huong
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
va dung » van dung, va duong, vat dung
tan van » tran van, tang van, luan van

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 trung) or (manh hung)) va dung cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hanh trung) OR (manh hung)) va dung cong tan van ban*.