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