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