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

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

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