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