Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tuan cong » thuan cong, luan cong, toan cong
tran cong » tran hong, trien cong, tran hoang
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than ban » thanh ban, toan ban, than man

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 - ((thanh trung) OR (thanh tung)) ((tuan cong) OR (tran cong)) cong tan than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((thanh trung) OR (thanh tung)) ((tuan cong) or (tran cong)) cong tan than ban~".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((thanh trung) OR (thanh tung)) ((tuan cong) or (tran cong)) cong tan than ban*.