Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung nam » trung tam, trong nam, trung cap
hung cong » hung cuong, phung cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - thanh trung nam ((hung cong) or (nhung cong)) san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - thanh trung nam ((hung cong) OR (nhung cong)) san toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - thanh trung nam ((hung cong) or (nhung cong)) san toan cao*.