Perhaps you should try some spelling variations:
ediciones del » ediciones de, edicion del, condiciones del
castro perez » castillo perez, arturo perez, castro pedro
campos perez » campo perez, campos perales, campos mendez
medicion de » medicina de
del campos » del campo, de campos, del campus
la pau » la paz

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( medicion de castro perez la pau ; ) OR ( ediciones del campos perez la pau ; ))~".
• Adding a wildcard symbol may retrieve word variants: (( medicion de castro perez la pau ; ) OR ( ediciones del campos perez la pau ; ))*.