Perhaps you should try some spelling variations:
"literatura delnl e isaac." » "literatura del e isaac.", "literatura de e isaac.", "literatura en e isaac.", "literatura delnl de isaac.", "literatura delnl en isaac.", "literatura delnl _ isaac."
"literatura o de isaacm." » "literatura a de isaacm.", "literatura _ de isaacm.", "literatura con de isaacm.", "literatura o de isaac.", "literatura o de islam.", "literatura o dde isaacm.", "literatura o den isaacm.", "literatura o d_ isaacm.", "literatura y de isaacm."
"literatura e de isla." » "literatura de de isla.", "literatura en de isla.", "literatura del de isla.", "literatura e de isaac.", "literatura y de isla.", "literatura _ de isla."

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