Perhaps you should try some spelling variations:
"factores biologicos" » "factores psicologicos", "factores economicos"
"factores politicos" » "factores criticos", "actos politicos", "factores climaticos", "ffactores criticos"
"actores politicos" » "factores criticos"
"efectos politicos" » "efectos positivos", "aspectos politicos", "derechos politicos"
"valores politicos" » "valores eticos"
"factos politicos" » "actos politicos", "impactos 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 biologicos") or ((("actores politicos") or ((((("factores politicos") or ((("factos politicos") OR ("efectos politicos"))))) or ("valores politicos"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("factores biologicos") OR ((("actores politicos") OR ((((("factores politicos") OR ((("factos politicos") OR ("efectos politicos"))))) OR ("valores politicos")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"factores biologicos\") or (((\"actores politicos\") or (((((\"factores politicos\") or (((\"factos politicos\") OR (\"efectos politicos\"))))) or (\"valores politicos\"))))))".
• Removing quotes may allow a broader search: (( factores biologicos ) or ((( actores politicos ) or ((((( factores politicos ) or ((( factos politicos ) OR ( efectos politicos ))))) or ( valores politicos )))))).
• Adding a wildcard symbol may retrieve word variants: (("factores biologicos") or ((("actores politicos") or ((((("factores politicos") or ((("factos politicos") OR ("efectos politicos"))))) or ("valores politicos"))))))*.

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