Perhaps you should try some spelling variations:
campos perez » campo perez, campos perales, campos mendez
ana crespo » vara crespo, avila crespo, angel crespo
edicion y » edicion de
y campos » y cambios, de campos
a crespo » j crespo, a cristo
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 campos perez el pan ; ) OR ( medicina ((a crespo) OR (ana crespo)) pedro a paz ; ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( edicion y campos perez el pan ; ) or ( medicina ((a crespo) OR (ana crespo)) pedro a paz ; ))~".
• Adding a wildcard symbol may retrieve word variants: (( edicion y campos perez el pan ; ) or ( medicina ((a crespo) OR (ana crespo)) pedro a paz ; ))*.