Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
trang vat » trang va, trang vai, tang vat
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
vat dung » van dung, va dung, viet dung
dan toan » van toan, dan than, manh toan

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 - hanh trang vat dung cong ((dan toan) or (thanh pho)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trang vat dung cong ((dan toan) OR (thanh pho)) ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trang vat dung cong ((dan toan) or (thanh pho)) ban*.