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