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