Perhaps you should try some spelling variations:
"christianity and author religions -- islam." » "christianity and author religion -- islam.", "christianity and after religious -- islam.", "christianity and major religions -- islam."
"christianity and other relations -- islam." » "christianity and other delegations -- islam.", "christianity and other reflections -- islam.", "christianity and better relations -- islam."
"christianity and other religions -- islam." » "christianity and author religions -- islam.", "christianity and other regionss -- islam.", "christianity and power religions -- islam."
"christianity and other religion -- islam." » "christianity and author religion -- islam.", "christianity and other regions -- islam.", "christianity and power religion -- islam."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("christianity and author religions -- islam.") or ("christianity and other relations -- islam."))) or ("christianity and other religions -- islam."))) or ("christianity and other religion -- islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("christianity and author religions -- islam.") OR ("christianity and other relations -- islam."))) OR ("christianity and other religions -- islam."))) OR ("christianity and other religion -- islam.")).
• Removing quotes may allow a broader search: (((((( christianity and author religions -- islam. ) or ( christianity and other relations -- islam. ))) or ( christianity and other religions -- islam. ))) or ( christianity and other religion -- islam. )).
• Adding a wildcard symbol may retrieve word variants: (((((("christianity and author religions -- islam.") or ("christianity and other relations -- islam."))) or ("christianity and other religions -- islam."))) or ("christianity and other religion -- islam."))*.