Perhaps you should try some spelling variations:
"fvalores politicos" » "actores politicos", "factores politico", "factores politicos", "fvalores eticos"
"factores politicos" » "actores politicos", "actos politicos", "factores biologicos"
"valores politicos" » "actores politicos", "valores eticos"
"factores criticos" » "factores critico", "factores critica", "factores critical"

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 ("valores politicos"))) OR ("factores criticos"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"fvalores politicos\") or (((((\"factores politicos\") OR (\"valores politicos\"))) or (\"factores criticos\"))))~".
• Removing quotes may allow a broader search: (( fvalores politicos ) or ((((( factores politicos ) OR ( valores politicos ))) or ( factores criticos ))))~.
• Adding a wildcard symbol may retrieve word variants: (("fvalores politicos") or ((((("factores politicos") OR ("valores politicos"))) or ("factores criticos"))))*.