Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
nhung don » nhung van, nhung bo
tong cong » trong cong, cong cong, dang cong
dung cong » dung trong
hoi hieu » hoi phieu, hoi tieu, moi hieu
dan toan » van toan, dan than, manh toan
toan cau » 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: hoi hieu lang - canh tranh cua ((((nhung don) or (tong cong))) or (dung cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - canh tranh cua ((((nhung don) OR (tong cong))) OR (dung cong)) dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - canh tranh cua ((((nhung don) or (tong cong))) or (dung cong)) dan toan cau*.