Perhaps you should try some spelling variations:
"process control statistical methodology." » "process control statistics methodology.", "proceso control statistical methodology.", "procesal control statistical methodology."
"procesos contables statistical methods." » "procesos sociales statistical methods.", "procesos penales 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: (("process control statistical methodology.") or ("procesos contables statistical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control statistical methodology.") OR ("procesos contables statistical methods."))*.
• Removing quotes may allow a broader search: (( process control statistical methodology. ) or ( procesos contables statistical methods. ))*.