Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
mot chieu » doi chieu, ho chieu
hanh dung » thanh dung, anh dung, hanh dong
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
doan van » doan va, hoang van, luan van
dan van » dang van, dao van, tan van

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 dung luan dang cong ((dan van) OR (doan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) tinh - hanh dung luan dang cong ((dan van) OR (doan van)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) tinh - hanh dung luan dang cong ((dan van) OR (doan van)) ban*".