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