Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh tram » hanh tam, hanh trang, thanh tran
van duong » van dong, van dung, van phong
doc hieu » toc thieu, hoc thieu, hoc hien
van hung » van dung, manh hung, van dong
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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 tram ((van hung) or (van duong)) huong ((dan toan) OR (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh tram ((van hung) OR (van duong)) huong ((dan toan) OR (van toan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh tram ((van hung) or (van duong)) huong ((dan toan) OR (van toan)) cau*".