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

You may be able to get more results by adjusting your search query.

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