Perhaps you should try some spelling variations:
"literatura maria de isla." » "literatura america de isla.", "literatura memoria de isla.", "literatura musica de isla.", "literatura maria del isla."
"literatura maria de isaac." » "literatura america de isaac.", "literatura memoria de isaac.", "literatura musica de isaac.", "literatura maria del isaac.", "literatura maria den isaac.", "literatura maria d_ isaac.", "literatura maria dc isaac."
"literatura de e isaac." » "literatura de en isaac.", "literatura de _ isaac.", "literatura de c isaac.", "literatura de el isaac.", "literatura de fe 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 e isaac.") or ((("literatura maria de isla.") OR ("literatura maria de isaac."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura de e isaac.") OR ((("literatura maria de isla.") OR ("literatura maria de isaac.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura de e isaac.\") or (((\"literatura maria de isla.\") OR (\"literatura maria de isaac.\"))))".
• Removing quotes may allow a broader search: (( literatura de e isaac. ) or ((( literatura maria de isla. ) OR ( literatura maria de isaac. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura de e isaac.") or ((("literatura maria de isla.") OR ("literatura maria de isaac."))))*.