Perhaps you should try some spelling variations:
"process control estadistica usos." » "process control estadistico usos.", "process economia estadistica usos.", "process control estadistica casos.", "process control estadistica con.", "process control estadistica milosz."
"procesos control statistical methods." » "proceso contra statistical methods.", "procesos contables statistical methods.", "proceso contralos statistical methods.", "procesos control statistics methods.", "procesos control 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: (("procesos control statistical methods.") or ("process control estadistica usos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesos control statistical methods.") OR ("process control estadistica usos.")).
• Removing quotes may allow a broader search: (( procesos control statistical methods. ) or ( process control estadistica usos. )).
• Adding a wildcard symbol may retrieve word variants: (("procesos control statistical methods.") or ("process control estadistica usos."))*.