Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tranh van » tran van, trinh van, thanh van
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
toan ban » van ban
toan cao » toan tap

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 - canh tranh van ((hang cong) or (dung cong)) tan ((toan ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh tranh van ((hang cong) OR (dung cong)) tan ((toan ban) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh van ((hang cong) or (dung cong)) tan ((toan ban) or (toan cao))*.