Perhaps you should try some spelling variations:
campo saber » como saber, campo saban, campo esther
medicion de » medicina de
caminos del » caminos de, camino de
accion del » accion de, accion en
del campo » el campo, de campo, del cambio
del la » del lao, del las, del loa
la pau » la paz

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( accion del campo saber y paz ; ) or ( medicion de caminos del la pau ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( accion del campo saber y paz ; ) OR ( medicion de caminos del la pau ; )).
• Adding a wildcard symbol may retrieve word variants: (( accion del campo saber y paz ; ) or ( medicion de caminos del la pau ; ))*.