Perhaps you should try some spelling variations:
"literatura _ del islam." » "literatura _ el islam."
"literatura y de islas." » "literatura y e islas.", "literatura y de isla.", "literatura y de islam."
"literatura de di isaac." » "literatura de de isaac.", "literatura de _ isaac.", "literatura de c isaac.", "literatura de mi isaac.", "literatura de si isaac."

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 y de islas.") OR ("literatura _ del islam."))) OR ("literatura de di isaac."))~.
• Removing quotes may allow a broader search: (((( literatura y de islas. ) or ( literatura _ del islam. ))) or ( literatura de di isaac. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura y de islas.") or ("literatura _ del islam."))) or ("literatura de di isaac."))*.