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

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 estadistica methodology.") or ("procesos control estadistico methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control estadistica methodology.") OR ("procesos control estadistico methods.")).
• Removing quotes may allow a broader search: (( process control estadistica methodology. ) or ( procesos control estadistico methods. )).
• Adding a wildcard symbol may retrieve word variants: (("process control estadistica methodology.") or ("procesos control estadistico methods."))*.