Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cuong » nhung cong, hung cuong, nhung chong
cuong danh » cuon danh, huong dan, cuong linh
hieu lang » chieu sang, hieu quang, nhieu tang
tam nhung » tham nhung, cam nhung, nam nhung
hoc hieu » hoc thieu, hoc hien, doc hieu

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 tam nhung cuong danh ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - thanh trung tam nhung cuong danh ((toan ban) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - thanh trung tam nhung cuong danh ((toan ban) or (van ban))*.