Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
manh toan » thanh toan, anh tuan, tinh toan
chi tinh » chai tinh, chi minh, chi binh
tranh va » tranh van, trang va, trinh va
toan ban » van ban
doi chi » doi khi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi tinh - canh tranh va ((nhung cong) or (hang cong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi tinh - canh tranh va ((nhung cong) OR (hang cong)) manh toan ban.
• Adding a wildcard symbol may retrieve word variants: doi chi tinh - canh tranh va ((nhung cong) or (hang cong)) manh toan ban*.