Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
tranh vap » tranh va, tranh van, tranh chap
dung cong » dung trong
vap dung » van dung, ap dung, va dung
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (nhieu tang)) - canh tranh vap dung cong dan ((toan cau) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (nhieu tang)) - canh tranh vap dung cong dan ((toan cau) or (toan tap))*.