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