Perhaps you should try some spelling variations:
campo perez » campos perez, camilo perez, crespo perez
edicion de » medicion de
perez joan » perez juan, pere joan, perez jose
edicion e » edicion en, medicion e, edicion y
joan paul » jean paul, john paul, jan paul
de campo » de cambio, el campo
deber el » deber del, debe el, weber el
deber en » deber ser, deber del, lieber en
e campo » el campo, en campo, e campos

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( edicion de campo ((deber el) OR (deber en)) pago ; ) or ( edicion e campo perez joan paul ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( edicion de campo ((deber el) OR (deber en)) pago ; ) OR ( edicion e campo perez joan paul ; )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( edicion de campo ((deber el) OR (deber en)) pago ; ) or ( edicion e campo perez joan paul ; ))".
• Adding a wildcard symbol may retrieve word variants: (( edicion de campo ((deber el) OR (deber en)) pago ; ) or ( edicion e campo perez joan paul ; ))*.