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

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