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

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• Performing a fuzzy search may retrieve terms with similar spellings: (("literature arab et islam.") or ((("literatura e el islam.") or ("literatura de en islam."))))~.
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• Removing quotes may allow a broader search: (( literature arab et islam. ) or ((( literatura e el islam. ) or ( literatura de en islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literature arab et islam.") or ((("literatura e el islam.") or ("literatura de en islam."))))*.