Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
danh thanh » dinh thanh, dang thanh, nhanh thanh
phong cong » phong chong, thong cong, chong cong
cong cong » cong dong, trong cong, dung cong
ho chieu » theo chieu, hoc thieu, mot chieu
thanh ca » thanh cha, thanh cac, thanh ha
dan van » dang van, doan van, dao van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - danh thanh ca ((phong cong) or (cong cong)) dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - danh thanh ca ((phong cong) OR (cong cong)) dan van ban*.