Perhaps you should try some spelling variations:
crespo perez » ernesto perez, cueto perez
crespo pedro » cerezo pedro
campos per » campus per, campos perez, campos super
edicion y » edicion de
y campos » y cambios, de campos
per el » ser el, per al, per il
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 per el pan ; ) OR ( medicina de ((crespo pedro) OR (crespo perez)) a paz ; ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( edicion y campos per el pan ; ) or ( medicina de ((crespo pedro) OR (crespo perez)) a paz ; ))~".
• Adding a wildcard symbol may retrieve word variants: (( edicion y campos per el pan ; ) or ( medicina de ((crespo pedro) OR (crespo perez)) a paz ; ))*.