Perhaps you should try some spelling variations:
"limites criticos republica." » "limites juridicos republica.", "limites politicos republica.", "limites eticos republica."
"sobre politica public." » "sobre politica publica.", "sobre politica publicas.", "sobre politico publico.", "sobre politicas public."
"serie politicas pablo." » "serie policiaca pablo.", "serie politica pablo.", "serie politicas para.", "serie politicas paz."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sobre politica public.") OR ("limites criticos republica."))) OR ("serie politicas pablo."))~.
• Removing quotes may allow a broader search: (((( sobre politica public. ) or ( limites criticos republica. ))) or ( serie politicas pablo. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sobre politica public.") or ("limites criticos republica."))) or ("serie politicas pablo."))*.