Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » thong cong, hang cong, nhung don
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
danh toan » manh toan, anh toan, dan toan
doi hieu » doi chieu, doc hieu, hoi hieu
doi hien » doi dien, doi bien, doi kien
toan ban » van ban

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) or (doi hien)) lang - canh trinh vat ((nhung cong) or (dung cong)) danh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi hieu) OR (doi hien)) lang - canh trinh vat ((nhung cong) OR (dung cong)) danh toan ban.
• Adding a wildcard symbol may retrieve word variants: ((doi hieu) or (doi hien)) lang - canh trinh vat ((nhung cong) or (dung cong)) danh toan ban*.