Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
hang cuong » tang cuong, hang cong, hang cung
doi chieu » doc hieu, doi chi, mot chieu
dang cong » dung cong
dung van » duong van, dung va, dang van
tap doan » tap quan
doan ban » doanh ban, toan ban, doan 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 - thanh dung van ((hang cuong) or (dang cong)) tap doan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh dung van ((hang cuong) OR (dang cong)) tap doan ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh dung van ((hang cuong) or (dang cong)) tap doan ban*.