Perhaps you should try some spelling variations:
medicion de » medicina de
campo perez » campos perez, camilo perez, crespo perez
edicion el » edicion del, edicion en, edicion e
campo per » campo der, campo para, campus per
de campo » de cambio
el campo » el cambio, el camino
per la » poder la

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( medicion de campo per la pau ; ) or ( edicion el campo perez la paz ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( medicion de campo per la pau ; ) OR ( edicion el campo perez la paz ; )).
• Adding a wildcard symbol may retrieve word variants: (( medicion de campo per la pau ; ) or ( edicion el campo perez la paz ; ))*.