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