Perhaps you should try some spelling variations:
medicina del » medicina de
medicion de » medicina de
del campo » el campo, de campo, del cambio
blas paz » la paz, blas pla, blas san
un paul » en paul, juan paul, un papel
campo a » campo la, campo y, campo _
a blas » san blas

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 puerto de un paul ; ) or ( medicina del campo a blas paz ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( medicion de puerto de un paul ; ) OR ( medicina del campo a blas paz ; )).
• Adding a wildcard symbol may retrieve word variants: (( medicion de puerto de un paul ; ) or ( medicina del campo a blas paz ; ))*.