Perhaps you should try some spelling variations:
"factores biologicos" » "factores psicologicos"
"factores economicos" » "sectores economicos", "factores socioeconomicos", "factores psicologicos"
"valores politicos" » "factores politicos", "valores eticos"
"actores politicos" » "factores politicos", "actos politicos"
"factores criticos" » "factores critico", "factores critica", "factores critical"

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

One or more facet filters have been applied to this search. If you remove filters, you may retrieve more results. Remove all filters from this search.