Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
cuong tap » luong tap, luong tai, cong tan
doc hieu » toc thieu, hoc thieu, hoc hien
tran van » luan van
cong tap » cong tan, tong tap, con tap
cong tac » cong ty
doan dau » doan dieu, phan dau, doan va

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 tran van nhung ((cong tap) OR (((cuong tap) OR (cong tac)))) doan dau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh tran van nhung ((cong tap) or (((cuong tap) or (cong tac)))) doan dau*.