Perhaps you should try some spelling variations:
"proceso control estadistica methods." » "proceso control estadisticas metodos.", "proceso control statistical methods.", "proceso control estadisticas medicas.", "proceso control estadistico methods.", "proceso economia estadistica methods.", "process control estadistica methods.", "proceso contra estadistica methods.", "proceso contralos estadistica methods."
"procesos control statistics methods." » "procesos control statistical methods.", "procesos control estadistico methods.", "procesos century statistics methods.", "procesos control statistics methodology.", "process control statistics methods.", "proceso contra statistics methods.", "procesos contables statistics methods."

Try widening your search to All Fields.

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