Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tac » cong ty
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: ho ((chiet tach) or (hieu lang)) - thanh trung cua nhung ((cong san) OR (cong tac)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (hieu lang)) - thanh trung cua nhung ((cong san) OR (cong tac)) than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chiet tach) or (hieu lang)) - thanh trung cua nhung ((cong san) OR (cong tac)) than cap".
• Adding a wildcard symbol may retrieve word variants: ho ((chiet tach) or (hieu lang)) - thanh trung cua nhung ((cong san) OR (cong tac)) than cap*.