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