Perhaps you should try some spelling variations:
camilo perez » castillo perez, calvo perez, castro perez
medicion de » medicina de
edicion el » edicion del, edicion en, edicion e
campo per » campo perez, campo para, campus per
campo der » campo de, campo del, campos del
el camilo » el camino, e camilo, cela camilo

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

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