Perhaps you should try some spelling variations:
"johann gottfried michael" » "johann gottfredson michael", "johann gottfried wilhelm", "johann fried michael"
"johann gottfried fichte" » "johann gottfried biewe", "johann gottfried kate", "johann gottfried wilhem"

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: (((("johann gottfried fichte") OR ("johann gottfried michael"))) OR ("johann gottlieb fichte")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"johann gottfried fichte\") OR (\"johann gottfried michael\"))) or (\"johann gottlieb fichte\"))".
• Removing quotes may allow a broader search: (((( johann gottfried fichte ) OR ( johann gottfried michael ))) or ( johann gottlieb fichte )).
• Adding a wildcard symbol may retrieve word variants: (((("johann gottfried fichte") OR ("johann gottfried michael"))) or ("johann gottlieb fichte"))*.