Perhaps you should try some spelling variations:
"process control estadistica datos." » "process control estadistico datos.", "process control statistical datos.", "process economia estadistica datos.", "process control estadisticas datos.", "process control estadistica casos.", "process control estadistica usos."
"proceso capital statistical methods." » "proceso digital statistical methods.", "proceso capitalista statistical methods.", "proceso criminal statistical methods.", "proceso capital statistics methods.", "proceso capital estadisticas methods."

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

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