Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
thanh tung » thanh cong
tung luan » dung luan, tang luan, tong luan
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang 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: ((theo chieu) OR (theo tieu)) tinh - thanh tung luan nang cong ((dan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) tinh - thanh tung luan nang cong ((dan toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo tieu)) tinh - thanh tung luan nang cong ((dan toan) or (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo tieu)) tinh - thanh tung luan nang cong ((dan toan) or (dan than)) cau*.