Perhaps you should try some spelling variations:
campus poder » campus per, cambio poder
medicion del » medicion de, edicion de, medicina del
mediacion y » mediacion en
campo para » camino para
campus de » campos de, campo de, corpus de
del campo » el campo, de campo, del cambio

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( mediacion y ((campus poder) OR (campus de)) de pan ; ) or ( medicion del campo para la paz ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( mediacion y ((campus poder) OR (campus de)) de pan ; ) OR ( medicion del campo para la paz ; ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( mediacion y ((campus poder) OR (campus de)) de pan ; ) or ( medicion del campo para la paz ; ))*".