Perhaps you should try some spelling variations:
"literatura arabi et islam." » "literatura arabe et islam.", "literature arab et islam.", "literatura para et islam.", "literatura carabi el islam.", "literatura arabe en islam.", "literatura arabi el islam.", "literatura arabi e islam.", "literatura arabi del islam."
"literatura den en islam." » "literatura de en islam.", "literatura en en islam.", "literatura del en islam.", "literatura den el islam.", "literatura den e islam.", "literatura den en ilam.", "literatura ven en islam.", "literatura ten en islam."
"literatura e un islam." » "literatura de un islam.", "literatura en un islam.", "literatura del un islam.", "literatura e el islam.", "literatura e e islam.", "literatura e al islam.", "literatura es un islam."

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