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 al de islam." » "literatura el de islam.", "literatura del de islam.", "literatura de 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."
"literatura al de islas." » "literatura el de islas.", "literatura del de islas.", "literatura de de islas.", "literatura al e islas.", "literatura al de isla.", "literatura al de isaias.", "literatura al dr islas."

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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 al de islas."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literature arab e islam.") OR ((("literatura al de islam.") OR ("literatura al de islas.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literature arab e islam.\") or (((\"literatura al de islam.\") OR (\"literatura al de islas.\"))))".
• Removing quotes may allow a broader search: (( literature arab e islam. ) or ((( literatura al de islam. ) OR ( literatura al de islas. )))).
• Adding a wildcard symbol may retrieve word variants: (("literature arab e islam.") or ((("literatura al de islam.") OR ("literatura al de islas."))))*.