Perhaps you should try some spelling variations:
frances » france, francesco
-universit%c3%a4t%20graz%22 » -universita%c3%a4t%20graz%22, -universitats%c3%a4t%20graz%22, -universitare%c3%a4t%20graz%22
universitaten%c3%a4t%20graz%22 » universitaaten%c3%a4t%20graz%22, universitatsaten%c3%a4t%20graz%22, universitareaten%c3%a4t%20graz%22
universitat%c3%a4t%20graz%22 » universitaat%c3%a4t%20graz%22, universitatsat%c3%a4t%20graz%22, universitareat%c3%a4t%20graz%22
universitatsaten%c3%a4t%20graz%22 » universitaatsaten%c3%a4t%20graz%22, universitatsatsaten%c3%a4t%20graz%22, universitareatsaten%c3%a4t%20graz%22, universitatsorten%c3%a4t%20graz%22, universitatsstadten%c3%a4t%20graz%22, universitatsbeamten%c3%a4t%20graz%22

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

• If you are trying to use Boolean operators, they must be ALL CAPS: %22karl-(franzens OR frances)(-universit%c3%a4t%20graz%22 OR -((universitaten%c3%a4t%20graz%22 OR universitat%c3%a4t%20graz%22) OR universitatsaten%c3%a4t%20graz%22)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22karl-(franzens or frances)(-universit%c3%a4t%20graz%22 or -((universitaten%c3%a4t%20graz%22 OR universitat%c3%a4t%20graz%22) or universitatsaten%c3%a4t%20graz%22))".
• Adding a wildcard symbol may retrieve word variants: %22karl-(franzens or frances)(-universit%c3%a4t%20graz%22 or -((universitaten%c3%a4t%20graz%22 OR universitat%c3%a4t%20graz%22) or universitatsaten%c3%a4t%20graz%22))*.