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

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

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