Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
nhu hieu » nhu hien, nha hieu, nho hieu
trong va » trong van, trong ca, trong cac
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
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: nhu hieu lang - hanh ((trong va) or (trong nha)) hang cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhu hieu lang - hanh ((trong va) OR (trong nha)) hang cong tac than cau*.