Perhaps you should try some spelling variations:
"serie policiaca publica." » "serie politica publicas.", "serie politicas publicas.", "serie politicas publicad."
"sobre politica publica." » "sobre politicas publicas.", "sobre politicas publica."
"etico politico publico." » "etico politica publicas.", "etico politico republicano.", "etico politicos republica.", "etica politica publico.", "mexico politica publico.", "mexico politics publico."

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: (((("sobre politica publica.") or ("etico politico publico."))) or ("serie policiaca publica."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sobre politica publica.") OR ("etico politico publico."))) OR ("serie policiaca publica.")).
• Removing quotes may allow a broader search: (((( sobre politica publica. ) or ( etico politico publico. ))) or ( serie policiaca publica. )).
• Adding a wildcard symbol may retrieve word variants: (((("sobre politica publica.") or ("etico politico publico."))) or ("serie policiaca publica."))*.