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