Perhaps you should try some spelling variations:
"literatura _ del islam." » "literatura _ el islam."
"literatura de di isaac." » "literatura de de isaac.", "literatura de _ isaac.", "literatura de c isaac.", "literatura de mi isaac.", "literatura de si isaac."
"literatura _ de islam." » "literatura _ de isla.", "literatura _ e islam.", "literatura _ de ilam."

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 di isaac.") or ((("literatura _ de islam.") or ("literatura _ del islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura de di isaac.") OR ((("literatura _ de islam.") OR ("literatura _ del islam."))))*.
• Removing quotes may allow a broader search: (( literatura de di isaac. ) or ((( literatura _ de islam. ) or ( literatura _ del islam. ))))*.