Perhaps you should try some spelling variations:
medicion de » medicina de
campo del » campos de, campo en
de campo » de cambio, el campo
lona pau » la pau
del plan » de plan, el plan
de lona » de lorna, de loja, de loa
plan a » plan _, plan e, plan d
lecciones » acciones

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: (( lecciones de campo de lona pau ; ) OR ( medicion de campo del plan a ; ))~.
• Adding a wildcard symbol may retrieve word variants: (( lecciones de campo de lona pau ; ) or ( medicion de campo del plan a ; ))*.