Perhaps you should try some spelling variations:
"literatura enl de isaac." » "literatura el de isaac.", "literatura del de isaac.", "literatura e de isaac.", "literatura espanal de isaac.", "literatura enll de isaac."
"literatura en de isla." » "literatura de de isla.", "literatura espana de isla."
"literatura o de isaacm." » "literatura e de isaacm.", "literatura a de isaacm.", "literatura _ de isaacm.", "literatura o de islam.", "literatura o e isaac.", "literatura y de isaacm."

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 o de isaacm.") or ("literatura enl de isaac."))) or ("literatura en de isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura o de isaacm.") OR ("literatura enl de isaac."))) OR ("literatura en de isla.")).
• Removing quotes may allow a broader search: (((( literatura o de isaacm. ) or ( literatura enl de isaac. ))) or ( literatura en de isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura o de isaacm.") or ("literatura enl de isaac."))) or ("literatura en de isla."))*.