Perhaps you should try some spelling variations:
"literatura sabe de isla." » "literatura isabel de isla.", "literatura arabe de isla.", "literatura sobre de isla."
"literatura sabe de isaac." » "literatura isabel de isaac.", "literatura arabe de isaac.", "literatura sobre de isaac."
"literatura de de islam." » "literatura de del islam.", "literatura de e islam.", "literatura de de ilam.", "literatura de fe islam.", "literatura de di 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 sabe de isla.") OR ("literatura sabe de isaac."))) or ("literatura de de islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura sabe de isla.") OR ("literatura sabe de isaac."))) OR ("literatura de de islam.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"literatura sabe de isla.\") OR (\"literatura sabe de isaac.\"))) or (\"literatura de de islam.\"))".
• Removing quotes may allow a broader search: (((( literatura sabe de isla. ) OR ( literatura sabe de isaac. ))) or ( literatura de de islam. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura sabe de isla.") OR ("literatura sabe de isaac."))) or ("literatura de de islam."))*.