Perhaps you should try some spelling variations:
"fvalores politicos" » "valores politicos", "factores politicos"
"factores clinicos" » "factores clinico", "factores criticos", "factores climaticos"
"factores politico" » "factores politicos", "factores clinico", "factores criticos"
"actores politicos" » "factores politicos", "actos politicos", "valores politicos"
"factos politicos" » "actos politicos", "factores politicos", "efectos politicos"

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: (((((("factores clinicos") or ("factos politicos"))) or ((("fvalores politicos") or ("factores politico"))))) or ("actores politicos"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("factores clinicos") OR ("factos politicos"))) OR ((("fvalores politicos") OR ("factores politico"))))) OR ("actores politicos")).
• Removing quotes may allow a broader search: (((((( factores clinicos ) or ( factos politicos ))) or ((( fvalores politicos ) or ( factores politico ))))) or ( actores politicos )).
• Adding a wildcard symbol may retrieve word variants: (((((("factores clinicos") or ("factos politicos"))) or ((("fvalores politicos") or ("factores politico"))))) or ("actores politicos"))*.