Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh dung » thanh dung, anh dung, hanh dong
ho chieu » hoc thieu, doi chieu, mot chieu
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
dan toan » van toan, dan than, manh toan
van than » van thanh, van thang, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (ho chieu)) tinh - hanh dung luan han cong ((dan toan) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) tinh - hanh dung luan han cong ((dan toan) OR (van than)) cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) tinh - hanh dung luan han cong ((dan toan) or (van than)) cau*.