Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
nhung huong » nhung phuong, nhung tuong, nhung cong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
doc hieu » toc thieu, hoc thieu, hoc hien
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: doc hieu lang - canh tranh cua ((nhung huong) or (dung phuong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - canh tranh cua ((nhung huong) OR (dung phuong)) dan toan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - canh tranh cua ((nhung huong) or (dung phuong)) dan toan cau*.