Perhaps you should try some spelling variations:
crespo perez » ernesto perez, cueto perez, crespo pedro
camilo perez » castillo perez, calvo perez, castro perez
medicion de » medicina de
campo perez » campos perez, amparo perez
edicion e » edicion de, edicion en, medicion e
e camilo » de camilo, y camilo, 1 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 perez) OR (crespo perez)) la pau ; ) or ( edicion e camilo perez la paz ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( medicion de ((campo perez) OR (crespo perez)) la pau ; ) OR ( edicion e camilo perez la paz ; )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( medicion de ((campo perez) OR (crespo perez)) la pau ; ) or ( edicion e camilo perez la paz ; ))".
• Adding a wildcard symbol may retrieve word variants: (( medicion de ((campo perez) OR (crespo perez)) la pau ; ) or ( edicion e camilo perez la paz ; ))*.