Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hinh tinh » hinh dinh, hinh kinh, hinh minh
nong san » nong dan, trong san, nang sang
dong san » dong bang, dong von, dong ha
cong san » cong tac
toan ban » van ban
tinh va » tich va, trinh van, trinh vat
va nang » van nang, da nang, cam nang

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 - hinh tinh va nang ((((nong san) or (dong san))) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hinh tinh va nang ((((nong san) OR (dong san))) OR (cong san)) toan ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hinh tinh va nang ((((nong san) or (dong san))) or (cong san)) toan ban*.