Perhaps you should try some spelling variations:
"literature arabe et islam." » "literatura arabe et islam.", "literature arab et islam.", "literature france et islam.", "literature arabe en islam.", "literature arabe e islam.", "literature arabe el islam.", "literature arabe del islam.", "literature arabe e islas."
"literatura es el islam." » "literatura e el islam.", "literatura el el islam.", "literatura del el islam."
"literatura en en islam." » "literatura de en islam.", "literatura espana en islam.", "literatura en e islam.", "literatura en un islam.", "literatura en en ilam.", "literatura en el islam."

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