Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
tam nhung » tham nhung, cam nhung, nam nhung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan ban » van ban

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) or (chieu sang)) - thanh trung tam nhung ((cong tan) OR (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - thanh trung tam nhung ((cong tan) OR (cong tac)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chieu sang)) - thanh trung tam nhung ((cong tan) OR (cong tac)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sang)) - thanh trung tam nhung ((cong tan) OR (cong tac)) toan ban*.