Perhaps you should try some spelling variations:
"proceso control estadisticas metodos." » "proceso control estadistica metodos.", "proceso control estadistico metodos.", "proceso economia estadisticas metodos.", "process control estadisticas metodos.", "proceso contra estadisticas metodos.", "proceso contralos estadisticas metodos."
"procesos control statistical methods." » "process control statistical methods.", "proceso contra statistical methods.", "procesos contables 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: (("proceso control estadisticas metodos.") OR ("procesos control statistical methods."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"proceso control estadisticas metodos.\") OR (\"procesos control statistical methods.\"))".
• Removing quotes may allow a broader search: (( proceso control estadisticas metodos. ) OR ( procesos control statistical methods. )).
• Adding a wildcard symbol may retrieve word variants: (("proceso control estadisticas metodos.") OR ("procesos control statistical methods."))*.