Perhaps you should try some spelling variations:
"process control statistical methodology." » "process control statistics methodology.", "process control statistical methods.", "proceso control statistical methodology.", "procesal control statistical methodology."
"procesos control estadisticas metodos." » "procesos control estadistica metodos.", "procesos control estadistico metodos.", "procesos economia estadisticas metodos.", "proceso contra estadisticas metodos.", "procesos contables estadisticas metodos.", "proceso contralos estadisticas metodos."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("process control statistical methodology.") or ("procesos control estadisticas metodos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control statistical methodology.") OR ("procesos control estadisticas metodos.")).
• Removing quotes may allow a broader search: (( process control statistical methodology. ) or ( procesos control estadisticas metodos. )).
• Adding a wildcard symbol may retrieve word variants: (("process control statistical methodology.") or ("procesos control estadisticas metodos."))*.