Perhaps you should try some spelling variations:
"literatura del ref islam." » "literatura de ref islam.", "literatura del e islam.", "literatura del de islam.", "literatura del rey islam.", "literatura del rif islam.", "literatura del re islam."
"literatura del del islam." » "literatura de del islam.", "literatura edel del islam.", "literatura del de islam.", "literatura del dem 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 del 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 del 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 del islam.\"))) or (\"literatura en el islam.\"))".
• Removing quotes may allow a broader search: (((( literatura del ref islam. ) OR ( literatura del del islam. ))) or ( literatura en el islam. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura del ref islam.") OR ("literatura del del islam."))) or ("literatura en el islam."))*.