Perhaps you should try some spelling variations:
"factores politicos" » "factores criticos", "actos politicos", "valores politicos", "ffactores criticos"
"sectores criticos" » "factores criticos", "aspectos criticos", "factores clinicos"
"actores politicos" » "factores criticos"
"errores criticos" » "factores criticos", "errores medicos"
"seres criticos" » "saberes criticos", "temas criticos", "retos 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 ((((("sectores criticos") OR ("errores criticos"))) or ("seres criticos"))))) or ("actores politicos"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("factores politicos") OR ((((("sectores criticos") OR ("errores criticos"))) OR ("seres criticos"))))) OR ("actores politicos")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"factores politicos\") or (((((\"sectores criticos\") OR (\"errores criticos\"))) or (\"seres criticos\"))))) or (\"actores politicos\"))".
• Removing quotes may allow a broader search: (((( factores politicos ) or ((((( sectores criticos ) OR ( errores criticos ))) or ( seres criticos ))))) or ( actores politicos )).
• Adding a wildcard symbol may retrieve word variants: (((("factores politicos") or ((((("sectores criticos") OR ("errores criticos"))) or ("seres criticos"))))) or ("actores politicos"))*.

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