Perhaps you should try some spelling variations:
"literatura e del islam." » "literatura en del islam.", "literatura del del islam.", "literatura e el islam.", "literatura de del islam.", "literatura 5e del islam.", "literatura y del islam."
"literatura de c isaac." » "literatura de _ isaac.", "literatura de e isaac.", "literatura de en isaac.", "literatura del c isaac.", "literatura de a 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 de de isaac.") or ("literatura de c isaac."))) or ("literatura e del islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de de isaac.") OR ("literatura de c isaac."))) OR ("literatura e del islam.")).
• Removing quotes may allow a broader search: (((( literatura de de isaac. ) or ( literatura de c isaac. ))) or ( literatura e del islam. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura de de isaac.") or ("literatura de c isaac."))) or ("literatura e del islam."))*.