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

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 klaus)))).
• 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 klaus))))".
• Adding a wildcard symbol may retrieve word variants: ((((christian friend) or (christian faith))) or (sebastian ferdinand)) ((friedrich krauss) or (((friedrich krause) OR (friedrich klaus))))*.