Perhaps you should try some spelling variations:
"sobre politica publica." » "sobre politicas publicas."
"ideas politicas public." » "ideas politicas publicas.", "ideas politicas publicad.", "ideas politica publicas.", "las politicas public.", "ideologias politicas public."
"sobre politicas paz." » "serie politicas paz.", "sobre politicas para.", "sobre politicas de.", "sobre politicas en."

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 politicas paz.") OR ("sobre politica publica."))) OR ("ideas politicas public."))~.
• Removing quotes may allow a broader search: (((( sobre politicas paz. ) or ( sobre politica publica. ))) or ( ideas politicas public. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sobre politicas paz.") or ("sobre politica publica."))) or ("ideas politicas public."))*.