Perhaps you should try some spelling variations:
"serie politico mexicano." » "serie politica mexicana.", "serie politica mexico.", "serie politicos mexico.", "serie politica mexicano.", "serie politicas mexicano.", "series political mexicano."
"sobre politicas publica." » "sobre politicas publicas.", "sobre politicas publicad.", "sobre politica publicas.", "serie politicas publica."
"sobre politica publica." » "sobre politicas publicas."

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 ("sobre politicas publica."))) or ("serie politico mexicano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sobre politica publica.") OR ("sobre politicas publica."))) OR ("serie politico mexicano."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sobre politica publica.\") OR (\"sobre politicas publica.\"))) or (\"serie politico mexicano.\"))*".
• Removing quotes may allow a broader search: (((( sobre politica publica. ) OR ( sobre politicas publica. ))) or ( serie politico mexicano. ))*.