Perhaps you should try some spelling variations:
"literatura en _ islam." » "literatura de _ islam.", "literatura espana _ islam."
"literatura el deseo visual." » "literatura del deseo visual.", "literatura e deseo visual.", "literatura de deseo visual.", "literatura el texto visual."
"literatura _ del islam." » "literatura _ el islam."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"literatura _ del islam.\") OR (\"literatura en _ islam.\"))) OR (\"literatura el deseo visual.\"))~".
• Removing quotes may allow a broader search: (((( literatura _ del islam. ) OR ( literatura en _ islam. ))) OR ( literatura el deseo visual. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura _ del islam.") OR ("literatura en _ islam."))) OR ("literatura el deseo visual."))*.