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
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 tap~.
• 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 tap".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) OR (theo chieu)) tinh - hanh huong cua cong cong dan toan tap*.