Perhaps you should try some spelling variations:
tang cuong » nang luong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
ban cuong » ban huong, van cuong, tan cuong
toan tai » doanh tai, toan ban, toan cao
toan tap » toan 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 - canh tranh cua ((ban cuong) or (tang cuong)) tap ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh tranh cua ((ban cuong) OR (tang cuong)) tap ((toan tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh tranh cua ((ban cuong) or (tang cuong)) tap ((toan tai) or (toan tap))*.