Perhaps you should try some spelling variations:
"fvalores politicos" » "valores politicos", "factores politico"
"factores politicos" » "factores criticos", "valores politicos", "factores biologicos", "ffactores criticos"
"actores politicos" » "factores criticos"
"actos politicos" » "aspectos politicos", "efectos politicos", "ciclos politicos"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("fvalores politicos") OR ((((("factores politicos") OR ("actores politicos"))) OR ("actos politicos"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"fvalores politicos\") or (((((\"factores politicos\") OR (\"actores politicos\"))) or (\"actos politicos\"))))~".
• Removing quotes may allow a broader search: (( fvalores politicos ) or ((((( factores politicos ) OR ( actores politicos ))) or ( actos politicos ))))~.
• Adding a wildcard symbol may retrieve word variants: (("fvalores politicos") or ((((("factores politicos") OR ("actores politicos"))) or ("actos politicos"))))*.