Perhaps you should try some spelling variations:
"literatura de del islam." » "literatura de el islam."
"literatura de e isaac." » "literatura de en isaac.", "literatura de _ isaac.", "literatura de c isaac.", "literatura de el isaac.", "literatura de fe isaac."
"literatura y de isaac." » "literatura y den isaac.", "literatura y d_ isaac.", "literatura y dc 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 de del islam.") or ("literatura de e isaac."))) or ("literatura y de isaac."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de del islam.") OR ("literatura de e isaac."))) OR ("literatura y de isaac."))*.
• Removing quotes may allow a broader search: (((( literatura de del islam. ) or ( literatura de e isaac. ))) or ( literatura y de isaac. ))*.