Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
chau tinh » cuu tinh, ha tinh, cua tinh
bien tinh » bi tinh, yen tinh, diep tinh
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
dan toan » van toan, dan than, manh toan
ban hang » ngan hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chau tinh) or (bien tinh)) - canh tranh luan nang cong ((dan toan) or (ban hang)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chau tinh) OR (bien tinh)) - canh tranh luan nang cong ((dan toan) OR (ban hang)) cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chau tinh) or (bien tinh)) - canh tranh luan nang cong ((dan toan) or (ban hang)) cau*.