Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh han, trinh toan
trinh quan » tinh quang, trinh luat, trinh han
mot chieu » doi chieu, ho chieu
tong cong » trong cong, cong cong, dung cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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 (hoc hien)) sach - hanh ((trinh luan) or (trinh quan)) tong cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (hoc hien)) sach - hanh ((trinh luan) OR (trinh quan)) tong cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (hoc hien)) sach - hanh ((trinh luan) or (trinh quan)) tong cong san toan cao*.