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 en un islam." » "literatura de un islam.", "literatura espana un islam.", "literatura den un islam.", "literatura deln un islam.", "literatura en e islam.", "literatura en al islam.", "literatura en _ islam."
"literatura e el islam." » "literatura de el islam.", "literatura del el islam.", "literatura en el islam.", "literatura es el islam."

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