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