Perhaps you should try some spelling variations:
"christianity and other regionss -- islam." » "christianity and other regional -- islam.", "christianity and other religions -- islam.", "christianity and other religionss -- islam."
"christianity and other religion -- islam." » "christianity and other religions -- islam.", "christianity and author religion -- islam.", "christianity and power religion -- islam."
"christianity and other regions -- islam." » "christianity and other religions -- 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 regionss -- islam.") or ((((("christianity and other religion -- islam.") OR ("christianity and other regions -- islam."))) or ("christianity and border regions -- islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("christianity and other regionss -- islam.") OR ((((("christianity and other religion -- islam.") OR ("christianity and other regions -- islam."))) OR ("christianity and border regions -- islam.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"christianity and other regionss -- islam.\") or (((((\"christianity and other religion -- islam.\") OR (\"christianity and other regions -- islam.\"))) or (\"christianity and border regions -- islam.\"))))".
• Removing quotes may allow a broader search: (( christianity and other regionss -- islam. ) or ((((( christianity and other religion -- islam. ) OR ( christianity and other regions -- islam. ))) or ( christianity and border regions -- islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("christianity and other regionss -- islam.") or ((((("christianity and other religion -- islam.") OR ("christianity and other regions -- islam."))) or ("christianity and border regions -- islam."))))*.