Perhaps you should try some spelling variations:
"literatura del di isaac." » "literatura de di isaac.", "literatura en di isaac.", "literatura del de isaac.", "literatura del _ isaac.", "literatura del c isaac.", "literatura del dia isaac.", "literatura del dit isaac."
"literatura y de islas." » "literatura y e islas.", "literatura y de isla.", "literatura y de isaias."
"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 y de islas.") OR ("literatura _ de islam."))) OR ("literatura del di isaac."))~.
• Removing quotes may allow a broader search: (((( literatura y de islas. ) or ( literatura _ de islam. ))) or ( literatura del di isaac. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura y de islas.") or ("literatura _ de islam."))) or ("literatura del di isaac."))*.