Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, tranh hang
thanh thao » thanh thanh, thanh thang, thanh pho
hieu xanh » chieu xanh, hieu manh, hieu nganh
thanh cao » thanh ca, thanh cac, thanh cham
doc hieu » toc thieu, hoc thieu, hoc hien
cong van » cong vang, song van, cong tan
cong san » cong tac
va dung » van dung, va duong, vat dung

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