Perhaps you should try some spelling variations:
"literatura arabes e isla." » "literatura arabe e isla.", "literatura arte e isla.", "literature arab e isla.", "literatura arabes e islas.", "literatura arabes de isla.", "literatura arabes e islam."
"literatura del de isaac." » "literatura de de isaac.", "literatura en de isaac.", "literatura del dean isaac."
"literatura e de isaac." » "literatura de de isaac.", "literatura en de isaac.", "literatura y de isaac.", "literatura _ 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 del de isaac."))) or ("literatura arabes e isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura e de isaac.") OR ("literatura del de isaac."))) OR ("literatura arabes e isla.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"literatura e de isaac.\") OR (\"literatura del de isaac.\"))) or (\"literatura arabes e isla.\"))".
• Removing quotes may allow a broader search: (((( literatura e de isaac. ) OR ( literatura del de isaac. ))) or ( literatura arabes e isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura e de isaac.") OR ("literatura del de isaac."))) or ("literatura arabes e isla."))*.