Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
thanh truong » thanh trung, thanh tung, thanh huong
hieu xanh » chieu xanh, hieu manh, hieu nganh
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tap » cuong tap, cong tac, cong tan
quan tam » quan tai, quan nam, quan tay
quan am » quan nam, quan ao, quang nam

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 truong) OR (thanh thuong)) quan dung cong tap ((quan tam) or (quan am))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((thanh truong) OR (thanh thuong)) quan dung cong tap ((quan tam) OR (quan am)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((thanh truong) OR (thanh thuong)) quan dung cong tap ((quan tam) or (quan am))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((thanh truong) OR (thanh thuong)) quan dung cong tap ((quan tam) or (quan am))*.