Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
trung cua » truong cua, trung tuan, trung cap
cuong tap » luong tap, luong tai, cong tan
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
toan tap » toan ban

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) or (nhieu tang)) - thanh trung cua dong ((cuong tap) OR (cong tac)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (nhieu tang)) - thanh trung cua dong ((cuong tap) OR (cong tac)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (nhieu tang)) - thanh trung cua dong ((cuong tap) OR (cong tac)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (nhieu tang)) - thanh trung cua dong ((cuong tap) OR (cong tac)) toan tap*.