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