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