Perhaps you should try some spelling variations:
"proceso control estadistico methodology." » "proceso control statistics methodology.", "proceso control statistical methodology.", "proceso contra estadistico methodology.", "proceso contralos estadistico methodology.", "proces contre estadistico methodology."
"process control science ethnology." » "process control science methodology.", "process control science sociology.", "process control science biotechnology.", "procesos control science ethnology.", "procesal control science ethnology."

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