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