Perhaps you should try some spelling variations:
"factores politicos" » "factores criticos", "actos politicos", "valores politicos", "ffactores criticos"
"impactos politicos" » "impacto politico", "impactos positivos", "aspectos politicos"
"actores politicos" » "factores criticos"
"factores critical" » "factores criticos", "factor critico", "factores clinico"
"factos politicos" » "actos politicos", "efectos politicos", "factores politico"

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