Perhaps you should try some spelling variations:
"literatura o de islas." » "literatura e de islas.", "literatura a de islas.", "literatura _ de islas.", "literatura o e islas.", "literatura o de isla.", "literatura o de islam.", "literatura y de islas."
"literatura de fe isaac." » "literatura de e isaac.", "literatura de _ isaac.", "literatura de c isaac."
"literatura de de isaac." » "literatura de di isaac."

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 islas.") or ((("literatura de de isaac.") OR ("literatura de fe isaac."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura o de islas.") OR ((("literatura de de isaac.") OR ("literatura de fe isaac.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura o de islas.\") or (((\"literatura de de isaac.\") OR (\"literatura de fe isaac.\"))))".
• Removing quotes may allow a broader search: (( literatura o de islas. ) or ((( literatura de de isaac. ) OR ( literatura de fe isaac. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura o de islas.") or ((("literatura de de isaac.") OR ("literatura de fe isaac."))))*.