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