Perhaps you should try some spelling variations:
"literatura arabe et islam." » "literatura breve et islam.", "literatura de et islam.", "literatura e et islam.", "literatura arabe en islam.", "literatura arabe e islam.", "literatura arabe el islam.", "literatura arabe del islam."
"literatura del de islam." » "literatura de de islam.", "literatura en de islam.", "literatura del del islam.", "literatura del e islam.", "literatura del de ilam.", "literatura del de isaacm.", "literatura del dean islam."
"literatura del de isla." » "literatura de de isla.", "literatura en de isla.", "literatura del de isaac.", "literatura del dean isla."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("literatura arabe et islam.") or ((("literatura del de islam.") OR ("literatura del de isla."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura arabe et islam.") OR ((("literatura del de islam.") OR ("literatura del de isla.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura arabe et islam.\") or (((\"literatura del de islam.\") OR (\"literatura del de isla.\"))))".
• Removing quotes may allow a broader search: (( literatura arabe et islam. ) or ((( literatura del de islam. ) OR ( literatura del de isla. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura arabe et islam.") or ((("literatura del de islam.") OR ("literatura del de isla."))))*.