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 es y islam." » "literatura en y islam.", "literatura el y islam.", "literatura del y islam.", "literatura des y islam.", "literatura ens y islam.", "literatura dels y islam.", "literatura es _ islam.", "literatura es el islam.", "literatura es al 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."

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