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