Perhaps you should try some spelling variations:
"literature arabes y isla." » "literatura arabe y isla.", "literature arab y isla.", "literature francesc y isla.", "literature arabes e isla.", "literature arabe y isla."
"literatura _ del islam." » "literatura _ el islam."
"literatura de e isaac." » "literatura de de isaac.", "literatura de en isaac.", "literatura de _ isaac.", "literatura de el isaac.", "literatura de fe isaac."

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: (((("literatura de e isaac.") or ("literatura _ del islam."))) or ("literature arabes y isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de e isaac.") OR ("literatura _ del islam."))) OR ("literature arabes y isla.")).
• Removing quotes may allow a broader search: (((( literatura de e isaac. ) or ( literatura _ del islam. ))) or ( literature arabes y isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura de e isaac.") or ("literatura _ del islam."))) or ("literature arabes y isla."))*.