Perhaps you should try some spelling variations:
"proces contreles estadisticas datos." » "proces control estadistica datos.", "proces hoteles estadistica datos.", "proces control estadistico datos.", "proces contreles estadistica casos.", "proces contreles estadisticas metodos.", "proces contreles estadisticas de.", "proceso contralos estadisticas datos.", "proces contre estadisticas datos.", "procesos contables estadisticas datos."
"process control statistical methods." » "procesos control statistical methods.", "proceso control statistical methods.", "procesal control statistical methods.", "process control statistics 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: (("process control statistical methods.") OR ("proces contreles estadisticas datos."))~.
• Removing quotes may allow a broader search: (( process control statistical methods. ) or ( proces contreles estadisticas datos. ))~.
• Adding a wildcard symbol may retrieve word variants: (("process control statistical methods.") or ("proces contreles estadisticas datos."))*.