Perhaps you should try some spelling variations:
johannes fischer » johanna fischer, johan fischer, johannes fechner
johannes richter » johannes michael, johannes dieter, johannes fechner
johan richter » john richter, von richter, johan fischer

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: ((johannes fischer) OR (((johan richter) OR (johannes richter)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((johannes fischer) or (((johan richter) OR (johannes richter))))".
• Adding a wildcard symbol may retrieve word variants: ((johannes fischer) or (((johan richter) OR (johannes richter))))*.