Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
cap nhung » cam nhung, vap nhung, canh nhung
dap nhung » vap nhung, va nhung, dap ung
doc hieu » toc thieu, hoc thieu, hoc hien
dan than » dan chan, ban than, van than
van tuan » van quan, van ban, anh tuan

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trinh ((cap nhung) OR (dap nhung)) cong ((dan than) OR (van tuan)) cau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trinh ((cap nhung) or (dap nhung)) cong ((dan than) or (van tuan)) cau*.