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