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

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

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