Perhaps you should try some spelling variations:
"literatura en un islam." » "literatura espana un islam.", "literatura en el islam.", "literatura en e islam.", "literatura en al islam."
"literatura al de isaac." » "literatura el de isaac.", "literatura del de isaac.", "literatura e de isaac.", "literatura al dr isaac."
"literatura de un islam." » "literatura de el islam.", "literatura de e islam.", "literatura de al 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 en un islam.") OR ("literatura de un islam."))) or ("literatura al de isaac."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura en un islam.") OR ("literatura de un islam."))) OR ("literatura al de isaac."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"literatura en un islam.\") OR (\"literatura de un islam.\"))) or (\"literatura al de isaac.\"))*".
• Removing quotes may allow a broader search: (((( literatura en un islam. ) OR ( literatura de un islam. ))) or ( literatura al de isaac. ))*.