Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu xanh » chieu xanh, hieu manh, hieu nganh
chua dong » cua dong, ha dong, huy dong
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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 ((cua dung) or (chua dong)) cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh trung ((cua dung) OR (chua dong)) cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh trung ((cua dung) or (chua dong)) cong san toan cao*.