Perhaps you should try some spelling variations:
ediciones de » condiciones de
edicion de » medicion de
campo per » campo der, campo perez, campo para
campo del » campo de, campos de, campo en
de campo » de cambio, el campo
las paz » las pau
las pap » las pau
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: (( ediciones de campo per la paz ; ) or ( edicion de campo del ((las paz) OR (las pap)) ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ediciones de campo per la paz ; ) OR ( edicion de campo del ((las paz) OR (las pap)) ; )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ediciones de campo per la paz ; ) or ( edicion de campo del ((las paz) OR (las pap)) ; ))".
• Adding a wildcard symbol may retrieve word variants: (( ediciones de campo per la paz ; ) or ( edicion de campo del ((las paz) OR (las pap)) ; ))*.