Perhaps you should try some spelling variations:
medicina del » medicina de
costo pedro » castro pedro, acosta pedro, soto pedro
edicion y » edicion de
del costo » el costo, de costo, del cono
y campo » y campos, el campo, y cambio
pedro a » pedro de
a paz » la paz, ma paz, y paz

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: (( edicion y campo ((poder de) OR (poder en)) papa ; ) OR ( medicina del costo pedro a paz ; ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( edicion y campo ((poder de) OR (poder en)) papa ; ) or ( medicina del costo pedro a paz ; ))~".
• Adding a wildcard symbol may retrieve word variants: (( edicion y campo ((poder de) OR (poder en)) papa ; ) or ( medicina del costo pedro a paz ; ))*.