Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
doanh luan » doanh nhan
van thang » van thanh, van khang, van hang
nong manh » duong manh, hoang manh, luong manh
nong lanh » bong lanh, dong lanh, song lanh
ho chieu » hoc thieu, doi chieu, mot chieu
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: ((ho chieu) or (theo chieu)) sach - doanh luan van thang ((nong manh) OR (nong lanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - doanh luan van thang ((nong manh) OR (nong lanh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) sach - doanh luan van thang ((nong manh) OR (nong lanh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) sach - doanh luan van thang ((nong manh) OR (nong lanh)) toan tap*.