Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thong » cong thuong, cong trong, dong thong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
doi hieu » doi chieu, doc hieu, doi hien
cong tac » cong ty
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan 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 - thanh trung cua nhung ((cong tac) or (cong thong)) ((than cap) OR (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh trung cua nhung ((cong tac) OR (cong thong)) ((than cap) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - thanh trung cua nhung ((cong tac) or (cong thong)) ((than cap) OR (khan cap))".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh trung cua nhung ((cong tac) or (cong thong)) ((than cap) OR (khan cap))*.