Perhaps you should try some spelling variations:
javier alvarez » javier alvarado, javier alva
mediciones e » mediciones de, mediciones y, ediciones de
campo javier » ocampo javier, cano javier, cacho javier
alvarez al » alvarez el, alvarez a, alvarez alva
de campo » de cambio, el campo
campo en » campo de, campo y
e campo » el campo, en campo, e campos

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( medicina de campo en la paz ; ) or ( mediciones e campo javier alvarez al ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( medicina de campo en la paz ; ) OR ( mediciones e campo javier alvarez al ; )).
• Adding a wildcard symbol may retrieve word variants: (( medicina de campo en la paz ; ) or ( mediciones e campo javier alvarez al ; ))*.