Perhaps you should try some spelling variations:
"mediacion y cambios social a pilar ;" » "mediacion y cambio social a pilar ;", "mediacion y cambios sociales a pilar ;", "mediacion y cambios socio a pilar ;", "mediacion en cambios social a pilar ;", "mediacion y cambios social ma pilar ;", "mediacion y cambios social m pilar ;", "mediacion y cambios social _ pilar ;"
"medicion de campo lameiro elena maza ;" » "medicion de campo romero elena maza ;", "medicina de campo lameiro elena maza ;", "medicion de campo lameiro elena maria ;", "medicion de cambio lameiro elena maza ;", "medicion el campo lameiro elena maza ;"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("mediacion y cambios social a pilar ;") OR ("medicion de campo lameiro elena maza ;"))~.
• Removing quotes may allow a broader search: (( mediacion y cambios social a pilar ; ) or ( medicion de campo lameiro elena maza ; ))~.
• Adding a wildcard symbol may retrieve word variants: (("mediacion y cambios social a pilar ;") or ("medicion de campo lameiro elena maza ;"))*.