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 estadistica methods." » "proceso contra estadisticas metodos.", "proceso contra statistical methods.", "proceso contra estadisticas medicas.", "proceso control estadistica methods.", "proceso control estadistico methods.", "proceso cultura estadistica 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 statistical methodology.") OR ("proceso contra estadistica methods."))~.
• Removing quotes may allow a broader search: (( process control statistical methodology. ) or ( proceso contra estadistica methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("process control statistical methodology.") or ("proceso contra estadistica methods."))*.