Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dang cong
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
nhu hieu » nhu hien, nha hieu, nho hieu
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap
anh dao » lanh dao, hanh dao, anh dat
dao duc » giao duc, tao duoc

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

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