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

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