Perhaps you should try some spelling variations:
campos perez » campo perez, campos perales, campos mendez
medicion de » medicina de
de campos » de caminos, de cambios
campo der » campo de, campo del, campos del
de campo » de cambio, el campo
la pau » la paz
der la » poder la, der laan, daher 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 campos perez la pau ; ) or ( condiciones de campo der la pau ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( medicion de campos perez la pau ; ) OR ( condiciones de campo der la pau ; )).
• Adding a wildcard symbol may retrieve word variants: (( medicion de campos perez la pau ; ) or ( condiciones de campo der la pau ; ))*.