Perhaps you should try some spelling variations:
"process control estadistico data." » "process control statistical data.", "process control estadistico para.", "process control estadisticos para.", "process control estadistico de."
"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 data."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesal control statistics methods.") OR ("process control estadistico data.")).
• Removing quotes may allow a broader search: (( procesal control statistics methods. ) or ( process control estadistico data. )).
• Adding a wildcard symbol may retrieve word variants: (("procesal control statistics methods.") or ("process control estadistico data."))*.