Perhaps you should try some spelling variations:
"procesos control estadistico methods." » "procesos control statistical methods.", "procesos control estadisticas metodos.", "process control estadistico methods.", "proceso contra estadistico methods.", "procesos contables estadistico methods."
"procesos control statistics methods." » "procesos control statistical methods.", "procesos control estadistica methods.", "procesos century statistics methods.", "procesos control statistics methodology.", "process control statistics methods.", "proceso contra statistics methods.", "procesos contables 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 statistics methods.") or ("procesos control estadistico methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesos control statistics methods.") OR ("procesos control estadistico methods."))*.
• Removing quotes may allow a broader search: (( procesos control statistics methods. ) or ( procesos control estadistico methods. ))*.