Perhaps you should try some spelling variations:
"factores psicologicos" » "factores psicosociales"
"factores biologicos" » "factores economicos"
"factores politicos" » "factores criticos", "actos politicos", "valores politicos", "ffactores criticos"
"actores politicos" » "factores criticos"
"ciclos politicos" » "actos politicos", "efectos politicos"

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

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.