Perhaps you should try some spelling variations:
"value hurtado, luis del" » "valle hurtado, luis del", "value hurtado, luis de", "value hurtado, luis e", "value hurtado, luis da"
"duque hurtado, luis del" » "duque hurtado, luis de", "duque hurtado, luis e", "duque hurtado, luis da", "luque hurtado, luis del"

Try widening your search to All Fields.

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"value hurtado, luis del\") OR (\"duque hurtado, luis del\"))".
• Removing quotes may allow a broader search: (( value hurtado, luis del ) OR ( duque hurtado, luis del )).
• Adding a wildcard symbol may retrieve word variants: (("value hurtado, luis del") OR ("duque hurtado, luis del"))*.