Perhaps you should try some spelling variations:
"factores climaticos" » "factores explicativos"
"factores politicos" » "actos politicos", "valores politicos", "factores biologicos", "factos politicos", "fvalores politicos"
"actores politicos" » "actos politicos", "valores politicos"
"ciclos politicos" » "actos politicos", "efectos 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 ("factores climaticos"))) or ((((("actores politicos") or ("ciclos politicos"))) or ("factores criticos"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("factores politicos") OR ("factores climaticos"))) OR ((((("actores politicos") OR ("ciclos politicos"))) OR ("factores criticos")))).
• Removing quotes may allow a broader search: (((( factores politicos ) or ( factores climaticos ))) or ((((( actores politicos ) or ( ciclos politicos ))) or ( factores criticos )))).
• Adding a wildcard symbol may retrieve word variants: (((("factores politicos") or ("factores climaticos"))) or ((((("actores politicos") or ("ciclos politicos"))) or ("factores criticos"))))*.

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