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

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 statistical methods.") OR ("proces contre statistical datos."))~.
• Removing quotes may allow a broader search: (( proceso contralos statistical methods. ) or ( proces contre statistical datos. ))~.
• Adding a wildcard symbol may retrieve word variants: (("proceso contralos statistical methods.") or ("proces contre statistical datos."))*.