Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
phan hieu » van hieu, phan kien, gian hieu
dung cong » dung trong
nha hieu » nha dieu, nghe hieu, phap hieu
tranh vi » trinh vi, tranh va, tranh cai
tan toan » tan tran, tap toan, van toan
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: ((nha hieu) or (phan hieu)) lang - canh tranh vi ((nhung cong) OR (dung cong)) tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nha hieu) OR (phan hieu)) lang - canh tranh vi ((nhung cong) OR (dung cong)) tan toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nha hieu) or (phan hieu)) lang - canh tranh vi ((nhung cong) OR (dung cong)) tan toan tap*".