Perhaps you should try some spelling variations:
thanh trung » thanh tung
tieu xanh » tieu danh, chieu xanh, tien anh
dung cong » dung trong
trung ha » trung hoc, trung tam, trung cap
dan toan » van toan, dan than, manh toan
ha dung » hai dung, kha dung, nha dung
van tan » van tuan, van ban, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu xanh) OR (dieu hanh)) - thanh trung ha dung cong ((dan toan) or (van tan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu xanh) OR (dieu hanh)) - thanh trung ha dung cong ((dan toan) OR (van tan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu xanh) OR (dieu hanh)) - thanh trung ha dung cong ((dan toan) or (van tan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu xanh) OR (dieu hanh)) - thanh trung ha dung cong ((dan toan) or (van tan)) cao*.