Perhaps you should try some spelling variations:
"valoracion multiple cada de las america" » "valoracion multiple cada de la america" (Expand Search), "valoracion multiple cada de los america" (Expand Search)
"valoracion multiples cada de las america" » "valoracion multiples cada de la america" (Expand Search), "valoracion multiples cada de los america" (Expand Search)

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: (("valoracion multiple cada de las america") OR ("valoracion multiples cada de las america"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"valoracion multiple cada de las america\") OR (\"valoracion multiples cada de las america\"))".
• Removing quotes may allow a broader search: (( valoracion multiple cada de las america ) OR ( valoracion multiples cada de las america )).
• Adding a wildcard symbol may retrieve word variants: (("valoracion multiple cada de las america") OR ("valoracion multiples cada de las america"))*.