Perhaps you should try some spelling variations:
medicion de » medicina de
edicion del » medicion del, edicion de, ediciones de
campo peru » campo perez, campo para, campo der
del campo » el campo, de campo, del cambio
de campos » de campo, de caminos, de cambios
la pau » la paz
a 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: (( edicion del campo peru a pau ; ) OR ( medicion de campos de la pau ; ))~.
• Adding a wildcard symbol may retrieve word variants: (( edicion del campo peru a pau ; ) or ( medicion de campos de la pau ; ))*.