Perhaps you should try some spelling variations:
"literatura del _ islam." » "literatura de _ islam.", "literatura en _ islam."
"literatura el deseo visual." » "literatura en deseo visual.", "literatura e deseo visual.", "literatura de deseo visual.", "literatura el texto visual."
"literatura _ de islam." » "literatura _ del islam.", "literatura _ de isla.", "literatura _ e 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 islam.") OR ("literatura del _ islam."))) OR ("literatura el deseo visual."))~.
• Removing quotes may allow a broader search: (((( literatura _ de islam. ) or ( literatura del _ islam. ))) or ( literatura el deseo visual. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura _ de islam.") or ("literatura del _ islam."))) or ("literatura el deseo visual."))*.