Perhaps you should try some spelling variations:
"process control statistical methodology." » "process control statistics methodology.", "process control statistical methods.", "procesos control statistical methodology.", "procesal control statistical methodology."
"proceso contra economics methodology." » "proceso coyuntura economica methodology.", "proceso cultural economics methodology.", "proceso cultura economica 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 statistical methodology.") OR ("proceso contra economics methodology."))~.
• Removing quotes may allow a broader search: (( process control statistical methodology. ) or ( proceso contra economics methodology. ))~.
• Adding a wildcard symbol may retrieve word variants: (("process control statistical methodology.") or ("proceso contra economics methodology."))*.