Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
ban thanh » ban hanh
tung cua » trung cua, tuong cua, tang cua
dung cua » dung luan, dung cho
ban hang » ngan hang
ho hieu » ho chieu, hoi hieu, nho hieu

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

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