Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
tran dung » tran dang, tran hung, tran quang
tan dung » tin dung, van dung, dan dung
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

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) or (hoc thieu)) xanh - thanh trung ((tan dung) OR (tran dung)) cong ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (hoc thieu)) xanh - thanh trung ((tan dung) OR (tran dung)) cong ban than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (hoc thieu)) xanh - thanh trung ((tan dung) OR (tran dung)) cong ban than cau".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (hoc thieu)) xanh - thanh trung ((tan dung) OR (tran dung)) cong ban than cau*.