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."
"procesal control statistics methods." » "procesal control statistical methods.", "procesal control estadistica methods.", "procesal century statistics methods.", "procesal control statistics methodology.", "social control statistics methods.", "proceso contra statistics methods.", "proces contre 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: (("procesal control statistics methods.") or ("process control estadistico datos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesal control statistics methods.") OR ("process control estadistico datos.")).
• Removing quotes may allow a broader search: (( procesal control statistics methods. ) or ( process control estadistico datos. )).
• Adding a wildcard symbol may retrieve word variants: (("procesal control statistics methods.") or ("process control estadistico datos."))*.