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, doanh dao
anh dat » thanh dat, lanh dao, dinh dat

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) OR (anh dat)) 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) OR (anh dat)) duc ((cong cong) OR (dung cong)) ban than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nhu hieu lang - ((anh dao) OR (anh dat)) duc ((cong cong) or (dung cong)) ban than cau".
• Adding a wildcard symbol may retrieve word variants: nhu hieu lang - ((anh dao) OR (anh dat)) duc ((cong cong) or (dung cong)) ban than cau*.