Perhaps you should try some spelling variations:
"proceso control devices methodology." » "proceso control service methodology.", "proceso control policies methodology.", "proceso control mexico methodology.", "process control devices methodology.", "proceso contra devices methodology.", "proceso contralos devices methodology.", "proceso control civiles methodology."
"procesal control statistical methods." » "process control statistical methods.", "social control statistical methods.", "proceso contra statistical methods.", "procesal control statistics methods.", "procesal control estadisticas methods."

You may be able to get more results by adjusting your search query.

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