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 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 zen de isaac."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura de del islam.\") OR (((\"literatura y en islam.\") OR (\"literatura zen de isaac.\"))))*".
• Removing quotes may allow a broader search: (( literatura de del islam. ) OR ((( literatura y en islam. ) OR ( literatura zen de isaac. ))))*.