Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
cong cong » cong dong, trong cong, dung cong
anh dung » anh dong, anh huong, sach dung
dung duc » duong duc, dang duc, dung du
duc cong » duc cuong, nuoc cong, chuc cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) or (chieu sach)) - anh dung duc cong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (chieu sach)) - anh dung duc cong cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) or (chieu sach)) - anh dung duc cong cong dan than cau*.