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