Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
nhung cong » dung cong, thong cong, hang cong
mot chieu » doi chieu, ho chieu
khach san » khach hang, thanh san
van nhung » van nhuong, va nhung, van hung
tan toan » tan tran, tap toan, van toan
bai toan » bai tap
san van » tan van, luan van, tran van

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: ((mot chieu) OR (theo chieu)) sang - khach san van nhung cong ((tan toan) OR (bai toan)) cao~.
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) sang - khach san van nhung cong ((tan toan) or (bai toan)) cao*.