Perhaps you should try some spelling variations:
"literature arabes de isla." » "literatura arabe de isla.", "literature arab de isla.", "literature francesc de isla.", "literature arabes e isla.", "literature arabe de isla.", "literature arabes y isla."
"literatura _ de islam." » "literatura _ del islam.", "literatura _ e islam.", "literatura _ de ilam."
"literatura de de isaac." » "literatura de fe isaac.", "literatura de di 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 de isaac.") or ("literatura _ de islam."))) or ("literature arabes de isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de de isaac.") OR ("literatura _ de islam."))) OR ("literature arabes de isla.")).
• Removing quotes may allow a broader search: (((( literatura de de isaac. ) or ( literatura _ de islam. ))) or ( literature arabes de isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura de de isaac.") or ("literatura _ de islam."))) or ("literature arabes de isla."))*.