Perhaps you should try some spelling variations:
"factores politicos" » "factores criticos", "actos politicos", "valores politicos", "factores clinicos", "factores criticoss", "actos politicoss", "ffactores criticos"
"fvalores politicos" » "valores politicos"
"factores politico" » "factores clinico", "factores criticos", "actos politicos"
"actores politicos" » "factores criticos"

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