Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cap » truong cao
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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 - thanh ((trung tam) or (trung cap)) nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh ((trung tam) OR (trung cap)) nhung cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((trung tam) or (trung cap)) nhung cong tac toan cao*.