Perhaps you should try some spelling variations:
"literatura del ref islam." » "literatura de ref islam.", "literatura del del islam.", "literatura del e islam.", "literatura del de islam.", "literatura del rey islam.", "literatura del re islam.", "literatura del rei islam."
"literatura del rif islam." » "literatura de rif islam.", "literatura del rio islam."
"literatura en el islam." » "literatura de el islam.", "literatura espana el islam."

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

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