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

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