Perhaps you should try some spelling variations:
"process control estadistico methodology." » "process control statistics methodology.", "process control statistical methodology.", "procesos control estadistico methodology.", "procesal control estadistico methodology."
"proceso control economics methodology." » "proceso cultural economics methodology.", "proceso contextos economicos methodology.", "proceso contra economics methodology.", "proceso contralos economics methodology.", "proces contre economics methodology."

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