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
e campo » el campo, en campo, e campos
raul a » paul a, raul g, raul h
a pau » la pau, a paul, a 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: (( ediciones ((del campo) OR (de campo)) en la paz ; ) OR ( medicion e campo raul a pau ; ))~.
• Adding a wildcard symbol may retrieve word variants: (( ediciones ((del campo) or (de campo)) en la paz ; ) or ( medicion e campo raul a pau ; ))*.