Perhaps you should try some spelling variations:
"procesal control estadistico methods." » "procesal control estadisticas metodos.", "procesal control statistical methods.", "process control estadistico methods.", "social control estadistico methods.", "proceso contra estadistico methods."
"procesos control estadistico methods." » "procesos control estadisticas metodos.", "procesos control statistical methods.", "process control estadistico methods.", "proceso contra estadistico methods.", "procesos contables estadistico methods."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesal control estadistico methods.") OR ("procesos control estadistico methods."))~.
• Removing quotes may allow a broader search: (( procesal control estadistico methods. ) or ( procesos control estadistico methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("procesal control estadistico methods.") or ("procesos control estadistico methods."))*.