Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
chi xanh » chi anh, chi danh, chi hanh
tac toan » tap toan, tam toan, hach toan
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 xanh - ((thanh trung) or (thanh tung)) vap ((nhung cong) OR (hang cong)) tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((thanh trung) OR (thanh tung)) vap ((nhung cong) OR (hang cong)) tac toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - ((thanh trung) or (thanh tung)) vap ((nhung cong) OR (hang cong)) tac toan ban*".