Perhaps you should try some spelling variations:
"literature arab e islam." » "literatura arabe e islam.", "literature early e islam.", "literatura para e islam.", "literature arab el islam.", "literature arab e islas.", "literature arab del islam.", "literature arabe e islam.", "literature arab _ islam.", "literature arabes e islam."
"literatura del dr islam." » "literatura de dr islam.", "literatura en dr islam.", "literatura del del islam.", "literatura del el islam.", "literatura del de isla."
"literatura al de islam." » "literatura el de islam.", "literatura de de islam.", "literatura en de islam.", "literatura al del islam.", "literatura al de isla.", "literatura al de ilam.", "literatura al de islas.", "literatura al ddel islam.", "literatura al dr islam."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("literature arab e islam.") or ((("literatura al de islam.") or ("literatura del dr islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literature arab e islam.") OR ((("literatura al de islam.") OR ("literatura del dr islam.")))).
• Removing quotes may allow a broader search: (( literature arab e islam. ) or ((( literatura al de islam. ) or ( literatura del dr islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literature arab e islam.") or ((("literatura al de islam.") or ("literatura del dr islam."))))*.