Perhaps you should try some spelling variations:
"process control estadistico datos." » "process control statistical datos.", "process control estadisticas datos.", "process control estadistico factor.", "process control estadistica casos."
"proces control statistics methods." » "proces control statistical methods.", "proces control estadistica methods.", "proces century statistics methods.", "proces control statistics methodology.", "proces contre statistics methods.", "proces contreles statistics methods.", "proceso contra statistics methods."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("proces control statistics methods.") or ("process control estadistico datos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("proces control statistics methods.") OR ("process control estadistico datos.")).
• Removing quotes may allow a broader search: (( proces control statistics methods. ) or ( process control estadistico datos. )).
• Adding a wildcard symbol may retrieve word variants: (("proces control statistics methods.") or ("process control estadistico datos."))*.