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