Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung ha
cong san » cong tac
san khan » san khau, san khac, san phan
khan dam » thanh dam, chang dam, khanh nam
tung va » tuong va, dung va, vung va

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 - thanh ((tung va) or (trung va)) trong cong san khan dam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((tung va) OR (trung va)) trong cong san khan dam*.