Perhaps you should try some spelling variations:
johannes fischer » johannes liesche, johannes pfister, johannes piscator
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: ((((johannes fischer) OR (johan fischer))) OR (johanna fischer)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((johannes fischer) OR (johan fischer))) or (johanna fischer))".
• Adding a wildcard symbol may retrieve word variants: ((((johannes fischer) OR (johan fischer))) or (johanna fischer))*.