Perhaps you should try some spelling variations:
crespo perez » ernesto perez, cueto perez, crespo pedro
ediciones un » ediciones en, mediciones en, ediciones con
caso javier » cano javier, caro javier, castro javier
perez yanet » perez yanelis, perez banquet
edicion a » edicion la, medicion a, edicion y
javier e » javier de
a crespo » j crespo, ana crespo, a cristo
e parto » el parto, de parto, y parto

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ediciones un caso javier e parto ; ) or ( edicion a crespo perez yanet (paul OR raul) ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ediciones un caso javier e parto ; ) OR ( edicion a crespo perez yanet (paul OR raul) ; )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ediciones un caso javier e parto ; ) or ( edicion a crespo perez yanet (paul OR raul) ; ))".
• Adding a wildcard symbol may retrieve word variants: (( ediciones un caso javier e parto ; ) or ( edicion a crespo perez yanet (paul OR raul) ; ))*.