Perhaps you should try some spelling variations:
condicion de » condiciones de
cambio per » cambio por, cambio poder, cambio para
de cambio » el cambio
uso campo » uso como, su campo
un campo » un camino, un cambio, un caso
laan pau » la pau, las pau
per la » poder la

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: (( condicion de cambio per la paz ; ) OR ( mediacion ((uso campo) OR (un campo)) der laan pau ; ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( condicion de cambio per la paz ; ) or ( mediacion ((uso campo) OR (un campo)) der laan pau ; ))~".
• Adding a wildcard symbol may retrieve word variants: (( condicion de cambio per la paz ; ) or ( mediacion ((uso campo) OR (un campo)) der laan pau ; ))*.