Perhaps you should try some spelling variations:
franzens » frances
francesco » francisco
-universit%c3%a4t%20graz%22* » -universitare%c3%a4t%20graz%22*
universitats%c3%a4t%20graz%22* » universitareats%c3%a4t%20graz%22*, universitatents%c3%a4t%20graz%22*
universitat%c3%a4t%20graz%22* » universitareat%c3%a4t%20graz%22*, universitatent%c3%a4t%20graz%22*
universita%c3%a4t%20graz%22* » universitarea%c3%a4t%20graz%22*, universitaten%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 francesco)(((-universit%c3%a4t%20graz%22* OR -universitats%c3%a4t%20graz%22*) OR -universitat%c3%a4t%20graz%22*) OR -universita%c3%a4t%20graz%22*).
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22karl-(franzens or francesco)(((-universit%c3%a4t%20graz%22* OR -universitats%c3%a4t%20graz%22*) or -universitat%c3%a4t%20graz%22*) or -universita%c3%a4t%20graz%22*)".
• Adding a wildcard symbol may retrieve word variants: %22karl-(franzens or francesco)(((-universit%c3%a4t%20graz%22* OR -universitats%c3%a4t%20graz%22*) or -universitat%c3%a4t%20graz%22*) or -universita%c3%a4t%20graz%22*)*.