Perhaps you should try some spelling variations:
"literatura arabe de isaac." » "literatura breve de isaac.", "literatura de de isaac.", "literatura e de isaac.", "literatura caribe de isaac.", "literatura sabe de isaac.", "literatura arabes e isaac."
"literatura y de islam." » "literatura y del islam.", "literatura y de isla.", "literatura y de ilam.", "literatura y de islas.", "literatura y ddel islam."
"literatura y e islam." » "literatura y el islam.", "literatura y e islas.", "literatura y del islam.", "literatura y en islam.", "literatura y se islam."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("literatura y de islam.") OR ("literatura y e islam."))) or ("literatura arabe de isaac."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura y de islam.") OR ("literatura y e islam."))) OR ("literatura arabe de isaac.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"literatura y de islam.\") OR (\"literatura y e islam.\"))) or (\"literatura arabe de isaac.\"))".
• Removing quotes may allow a broader search: (((( literatura y de islam. ) OR ( literatura y e islam. ))) or ( literatura arabe de isaac. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura y de islam.") OR ("literatura y e islam."))) or ("literatura arabe de isaac."))*.