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