Perhaps you should try some spelling variations:
politicas republicanas » politica republicana, politicas publicas, politico republicano
politica publicas » politicas publicas, politica publica, politica publicaciones
politics publicas » politicas publicas, politicas publicad, politica publica
mexico politics » mexico politica

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: (( serie ((politica publicas) OR (politicas republicanas)). ) OR ( mexico politics publicas. ))~.
• Adding a wildcard symbol may retrieve word variants: (( serie ((politica publicas) or (politicas republicanas)). ) or ( mexico politics publicas. ))*.