Perhaps you should try some spelling variations:
johannes bosscha » johannes basch, johannes liesche
johannes fischer » johanna fischer, johannes fechner, johannes liesche
johan fischer » johanna fischer, johann fischart, johan 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: ((((johannes bosscha) OR (johannes fischer))) OR (johan fischer)).
• Adding a wildcard symbol may retrieve word variants: ((((johannes bosscha) or (johannes fischer))) or (johan fischer))*.