Perhaps you should try some spelling variations:
"proceso contra statistics methodology." » "proceso contra semiotics methodology.", "proceso contra linguistics methodology.", "proceso century statistics methodology.", "proceso control statistical methodology.", "process control statistics methodology."
"procesos contables statistical methods." » "procesos control statistical methods.", "procesos sociales statistical methods.", "procesos penales statistical methods."

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: (("proceso contra statistics methodology.") OR ("procesos contables statistical methods."))~.
• Removing quotes may allow a broader search: (( proceso contra statistics methodology. ) or ( procesos contables statistical methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("proceso contra statistics methodology.") or ("procesos contables statistical methods."))*.