Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu xanh » chieu xanh, hieu manh, hieu nganh
trung cap » truong cao, trung tam
dung cong » dung trong
van thanh » ban thanh, van tuan
thanh cau » thanh chau, thanh mau, nhanh cau
doc hieu » toc thieu, hoc thieu, hoc hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - thanh trung cap ((dung cong) or (dang cong)) van thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh trung cap ((dung cong) OR (dang cong)) van thanh cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh trung cap ((dung cong) or (dang cong)) van thanh cau*.