Perhaps you should try some spelling variations:
medicion e » medicion de, medicion y, mediacion en
campo raul » campos raul, campa raul, campo arauz
del campo » el campo, del cambio
de campo » de cambio, el campo
raul roa » raul a, raul o
e campo » el campo, en campo, e campos
roa pau » roa raul, roig pau

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: (( ediciones ((del campo) OR (de campo)) en la paz ; ) OR ( medicion e campo raul roa pau ; ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ediciones ((del campo) OR (de campo)) en la paz ; ) or ( medicion e campo raul roa pau ; ))~".
• Adding a wildcard symbol may retrieve word variants: (( ediciones ((del campo) OR (de campo)) en la paz ; ) or ( medicion e campo raul roa pau ; ))*.