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 richter, johan schei

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