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

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