Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
quan dong » quang dong, quan long, quan hoang
hoang van » hang va
doc hieu » toc thieu, hoc thieu, hoc hien
canh ban » can ban, canh dan, canh van
ban quan » van quan
dang van » hang va
than cau » toan cau, phan cau, than cap

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 - canh ban quan dong ((dang van) OR (hoang van)) than cau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh ban quan dong ((dang van) or (hoang van)) than cau*.