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