Perhaps you should try some spelling variations:
"literatura zenon de isaac." » "literatura en de isaac.", "literatura con de isaac.", "literatura antoni de isaac.", "literatura canon de isaac."
"literatura de del islam." » "literatura de el islam."
"literatura y en islam." » "literatura y el islam.", "literatura y e islam.", "literatura y un islam."

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