Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
truong va » truong dai, truong cao, truong dao
khi xanh » khia canh, thi hanh, thi anh
trang va » tran van, hang va
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 khi xanh - manh ((trang va) or (truong va)) nhung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khi xanh - manh ((trang va) OR (truong va)) nhung cong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: doi khi xanh - manh ((trang va) or (truong va)) nhung cong tac toan ban*.