Perhaps you should try some spelling variations:
"literatura maya e islam." » "literatura maria e islam.", "literatura mas e islam.", "literatura ma e islam.", "literatura maya el islam.", "literatura maya e islas.", "literatura maya del islam.", "literatura maya en islam.", "literatura maya de islam."
"literatura de un isaac." » "literatura de en isaac.", "literatura de de isaac.", "literatura de _ isaac."
"literatura as un islam." » "literatura as el islam.", "literatura as al islam.", "literatura as _ islam."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de un isaac.") OR ("literatura as un islam."))) OR ("literatura maya e islam."))~.
• Removing quotes may allow a broader search: (((( literatura de un isaac. ) or ( literatura as un islam. ))) or ( literatura maya e islam. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura de un isaac.") or ("literatura as un islam."))) or ("literatura maya e islam."))*.