Perhaps you should try some spelling variations:
friedrich strauss » friedrich gauss
christian friend » christian friends, christian science, christian france
friedrich krauss » friedrich gauss, friedrich klaus, friedrich friess
friedrich krause » friedrich klaus, friedrich pause, friedrich glauser

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: ((((christian friend) OR (christian faith))) OR (sebastian ferdinand)) ((((friedrich krauss) OR (friedrich krause))) OR (friedrich strauss)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((christian friend) or (christian faith))) or (sebastian ferdinand)) ((((friedrich krauss) OR (friedrich krause))) or (friedrich strauss))".
• Adding a wildcard symbol may retrieve word variants: ((((christian friend) or (christian faith))) or (sebastian ferdinand)) ((((friedrich krauss) OR (friedrich krause))) or (friedrich strauss))*.