Perhaps you should try some spelling variations:
"factores politicos" » "actos politicos", "factores biologicos", "factores climaticos", "factos politicos"
"efectos politicos" » "aspectos politicos", "derechos politicos", "efectos juridicos"
"valores politicos" » "valores eticos"
"actores politicos" » "actos politicos"
"factores criticos" » "factores critico", "factores critica", "factores critical"

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

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