Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
tung cua » trung cua, tuong cua, tang cua
dung cua » dung cho
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
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: theo hieu lang - thanh ((tung cua) or (((dung cua) OR (dung luan)))) nhung cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh ((tung cua) OR (((dung cua) OR (dung luan)))) nhung cong tac than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - thanh ((tung cua) or (((dung cua) OR (dung luan)))) nhung cong tac than cap".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - thanh ((tung cua) or (((dung cua) OR (dung luan)))) nhung cong tac than cap*.