Perhaps you should try some spelling variations:
"literatura el _ islam." » "literatura del _ islam.", "literatura en _ islam.", "literatura e _ islam."
"literatura el deber islam." » "literatura del deber islam.", "literatura en deber islam.", "literatura e deber islam.", "literatura el deseo islam."
"literatura de de isla." » "literatura de de isaac.", "literatura de fe isla.", "literatura de di isla."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de de isla.") OR ("literatura el _ islam."))) OR ("literatura el deber islam."))~.
• Removing quotes may allow a broader search: (((( literatura de de isla. ) or ( literatura el _ islam. ))) or ( literatura el deber islam. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura de de isla.") or ("literatura el _ islam."))) or ("literatura el deber islam."))*.