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

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

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