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 arabe e islam.", "literature arab _ islam.", "literature arabes e islam."
"literature arab del islam." » "literatura arabe del islam.", "literature early del islam.", "literatura para del islam.", "literature arab el islam.", "literature arabes del islam.", "literature caras del islam.", "literature arabe de islam."
"literatura e y islam." » "literatura de y islam.", "literatura en y islam.", "literatura del y islam.", "literatura e _ islam.", "literatura e el islam.", "literatura e al islam.", "literatura fe y islam.", "literatura es y islam."

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