Perhaps you should try some spelling variations:
thanh tung » thanh cong
cua truong » cua trung, xuan truong, xa truong
tac doanh » cac doanh, tac danh, toan doanh
doanh cao » doanh co, doanh bao, doanh cho
chi xanh » chi danh, chi hanh, chieu xanh
cong tac » cong ty
chi anh » chi danh, chi hanh, thi anh

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) or (chi anh)) - thanh tung ((cua truong) OR (cac truong)) cong tac doanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi anh)) - thanh tung ((cua truong) OR (cac truong)) cong tac doanh cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) or (chi anh)) - thanh tung ((cua truong) OR (cac truong)) cong tac doanh cao*".