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."
"procesos control statistical methods." » "process control statistical methods.", "proceso contra statistical methods.", "procesos contables statistical methods.", "procesos control estadisticas 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 contralos statistics methods.") or ("procesos control statistical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("proceso contralos statistics methods.") OR ("procesos control statistical methods."))*.
• Removing quotes may allow a broader search: (( proceso contralos statistics methods. ) or ( procesos control statistical methods. ))*.