Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
dung chung » dung cong, dung ung, dung trung
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
tranh va » tranh van, trang va, trinh va
dan toan » van toan, dan than, manh toan
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: theo hieu lang - canh tranh va ((nhung phuong) or (dung chung)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - canh tranh va ((nhung phuong) OR (dung chung)) dan toan cao*.