Perhaps you should try some spelling variations:
"literatura de le islam." » "literatura de e islam.", "literatura de de islam.", "literatura de del islam.", "literatura de la islam.", "literatura de lo islam."
"literatura de fe islam." » "literatura de e islam.", "literatura de de islam.", "literatura de del islam."
"literatura de a islam." » "literatura de al islam.", "literatura de e islam.", "literatura de _ islam.", "literatura de la 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 a islam.") OR ("literatura de le islam."))) OR ("literatura de fe islam."))~.
• Removing quotes may allow a broader search: (((( literatura de a islam. ) or ( literatura de le islam. ))) or ( literatura de fe islam. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura de a islam.") or ("literatura de le islam."))) or ("literatura de fe islam."))*.