Perhaps you should try some spelling variations:
"valoracion multiples cada de las americas" » "valoracion multiples cada de la americas" (Expand Search), "valoracion multiples cada de las america" (Expand Search)
"valoracion multiple casa de los americano" » "valoracion multiple casa 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 casa de los americano") OR ("valoracion multiples cada de las americas"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"valoracion multiple casa de los americano\") OR (\"valoracion multiples cada de las americas\"))".
• Removing quotes may allow a broader search: (( valoracion multiple casa de los americano ) OR ( valoracion multiples cada de las americas )).
• Adding a wildcard symbol may retrieve word variants: (("valoracion multiple casa de los americano") OR ("valoracion multiples cada de las americas"))*.