Perhaps you should try some spelling variations:
poderes mexico » mujeres mexico, bodies mexico, hombres mexico
pobres mexico » pobreza mexico, bodies mexico
poder mexico » power mexico, modern mexico, moderno mexico
dos editores » los editores, dos escritores, los auditores
y medicos » y medios, y medicion, de medicos
tu dos » du dos

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: ((((poder mexico) OR (((poderes mexico) OR (pobres mexico))))) OR (y medicos)), tu dos editores.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((poder mexico) or (((poderes mexico) OR (pobres mexico))))) or (y medicos)), tu dos editores.~".
• Adding a wildcard symbol may retrieve word variants: ((((poder mexico) or (((poderes mexico) OR (pobres mexico))))) or (y medicos)), tu dos editores.*.