Perhaps you should try some spelling variations:
"christianity and other religions -- islam." » "christianity and author religions -- islam.", "christianity and power religions -- islam.", "christianity and mothers religiouss -- islam.", "christianity and other religious -- islam.", "christianity and other relations -- islam."
"christianity and other religion -- islam." » "christianity and author religion -- islam.", "christianity and power religion -- islam.", "christianity and mothers religious -- islam."
"christianity and other regions -- islam." » "christianity and border regions -- 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 other religions -- islam.") or ((("christianity and other religion -- islam.") or ("christianity and other regions -- islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("christianity and other religions -- islam.") OR ((("christianity and other religion -- islam.") OR ("christianity and other regions -- islam.")))).
• Removing quotes may allow a broader search: (( christianity and other religions -- islam. ) or ((( christianity and other religion -- islam. ) or ( christianity and other regions -- islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("christianity and other religions -- islam.") or ((("christianity and other religion -- islam.") or ("christianity and other regions -- islam."))))*.