Perhaps you should try some spelling variations:
"process control estadistico methodology." » "process control statistics methodology.", "procesos control estadistico methodology.", "procesal control estadistico methodology."
"proceso control statistical methodology." » "proceso control statistics methodology.", "proceso control statistical methods.", "proceso contra statistical methodology.", "proceso contralos statistical methodology.", "proces contre statistical methodology."

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: (("process control estadistico methodology.") OR ("proceso control statistical methodology."))~.
• Removing quotes may allow a broader search: (( process control estadistico methodology. ) or ( proceso control statistical methodology. ))~.
• Adding a wildcard symbol may retrieve word variants: (("process control estadistico methodology.") or ("proceso control statistical methodology."))*.