Perhaps you should try some spelling variations:
thuong manh » thuong mach, thuong nganh, thuong mai
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
tranh va » tranh van, trang va, trinh va
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (nhieu tang)) - canh tranh va hang thuong manh ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (nhieu tang)) - canh tranh va hang thuong manh ((toan tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (nhieu tang)) - canh tranh va hang thuong manh ((toan tai) or (toan tap))*.