Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
trung cap » truong cao
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: ho ((hieu lang) OR (nhieu tang)) - thanh ((trung tam) or (trung cap)) nhung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - thanh ((trung tam) OR (trung cap)) nhung cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (nhieu tang)) - thanh ((trung tam) or (trung cap)) nhung cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (nhieu tang)) - thanh ((trung tam) or (trung cap)) nhung cong tac toan tap*.