Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
doi hieu » doi chieu, doc hieu, doi hien
lanh ban » lanh bang, lang ban, doanh ban
ban quan » van quan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - lanh ban quan ((nhung cong) or (hang cong)) thanh ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - lanh ban quan ((nhung cong) OR (hang cong)) thanh ((than cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - lanh ban quan ((nhung cong) or (hang cong)) thanh ((than cau) or (than cap))*.