Perhaps you should try some spelling variations:
johannes fischer » johannes fechner, johannes liesche, johannes pfister
johanna fischer » johann fischart, johanna kissler, johanna borchert
johan fischer » johann fischart, johan schei, susan fischer
johan richter » john richter, johannes richter, von richter

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