Perhaps you should try some spelling variations:
"factores politicos" » "factores criticos", "factores biologicos", "factores climaticos", "ffactores criticos"
"aspectos politicos" » "aspectos juridicos", "aspectos eticos", "aspectos psicologicos"
"valores politicos" » "valores eticos"
"actores politicos" » "factores criticos"
"actos politicos" » "efectos politicos", "ciclos politicos", "partidos politicos"

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

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