Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
trung ha » trung hoc, trung tam, trung cap
toan cao » toan tap
toan ban » van ban
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 ha ((nhung cong) or (hang cong)) thanh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh trung ha ((nhung cong) OR (hang cong)) thanh ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh trung ha ((nhung cong) or (hang cong)) thanh ((toan cao) or (toan ban))*.