Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh dong » anh dong, ha dong
dong luan » dung luan, tong luan, dong xuan
ho chieu » hoc thieu, doi chieu, mot chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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: ((theo chieu) OR (ho chieu)) tinh - hanh dong luan van ((cong dan) OR (cong san)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) tinh - hanh dong luan van ((cong dan) or (cong san)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) tinh - hanh dong luan van ((cong dan) or (cong san)) toan cau*.