Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
manh tung » manh hung, thanh tung
khi xanh » khia canh, thi hanh, thi anh
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
tung va » trung va, tuong va, dung va

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

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