Perhaps you should try some spelling variations:
"proceso control statistical methodology." » "proceso control statistics methodology.", "proceso control statistical methods.", "proceso contra statistical methodology.", "proceso contralos statistical methodology.", "proces contre statistical methodology."
"process control racional methodology." » "process control science methodology.", "process control operacional methodology.", "process control tradicional methodology.", "process control poblacional methodology.", "procesos control racional methodology.", "procesal control racional methodology."

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