Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh huong » thanh huong, anh huong, manh huong
mot chieu » doi chieu, ho chieu
huong cua » dung cua
cong cong » cong dong, trong cong, dung cong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (theo chieu)) tinh - hanh huong cua cong cong ((dan toan) OR (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) tinh - hanh huong cua cong cong ((dan toan) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) tinh - hanh huong cua cong cong ((dan toan) OR (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) tinh - hanh huong cua cong cong ((dan toan) OR (dan than)) cao*.