Perhaps you should try some spelling variations:
"literatura araben en islam." » "literatura arabe en islam.", "literatura arte en islam.", "literature arab en islam.", "literatura arabes en islam.", "literatura agamben en islam.", "literatura araben el islam.", "literatura araben e islam.", "literatura araben en ilam."
"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 _ islam.", "literatura es un islam."
"literatura e al islam." » "literatura de al islam.", "literatura en al islam.", "literatura del al islam.", "literatura e el islam.", "literatura e del islam.", "literatura e e islam.", "literatura et al islam."

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