Perhaps you should try some spelling variations:
"christianity and other religious -- islam." » "christianity and mothers religious -- islam.", "christianity and inter religious -- islam.", "christianity and other regions -- islam."
"christianity and other religions -- islam." » "christianity and other relations -- islam.", "christianity and other regions -- islam."

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 religious -- islam."))) or ("christianity and author religion -- islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("christianity and other religions -- islam.") OR ("christianity and other religious -- islam."))) OR ("christianity and author religion -- islam."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"christianity and other religions -- islam.\") OR (\"christianity and other religious -- islam.\"))) or (\"christianity and author religion -- islam.\"))*".
• Removing quotes may allow a broader search: (((( christianity and other religions -- islam. ) OR ( christianity and other religious -- islam. ))) or ( christianity and author religion -- islam. ))*.