Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
tranh vat » trinh vat, tranh va, tranh van
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 tap » toan 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 tranh vat ((nhung cong) OR (dung cong)) danh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi hieu) OR (doi hien)) lang - canh tranh vat ((nhung cong) OR (dung cong)) danh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi hieu) or (doi hien)) lang - canh tranh vat ((nhung cong) OR (dung cong)) danh toan tap".
• Adding a wildcard symbol may retrieve word variants: ((doi hieu) or (doi hien)) lang - canh tranh vat ((nhung cong) OR (dung cong)) danh toan tap*.