Perhaps you should try some spelling variations:
christian friend » christian friends, christian science, christian france
christian scheme » christian society, christian schmidt, christian scholar
friedrich krauss » friedrich krause, friedrich strauss, friedrich klaus
friedrich gauss » friedrich august

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