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