Perhaps you should try some spelling variations:
medicina del » medicina de
credo perez » crespo perez, cueto perez, prado perez
edicion y » edicion de
del credo » el credo, del crudo, del credito
y campus » y campos, y camps, y camus
poder el » poder del, poder en
poder de » poder en

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

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