Perhaps you should try some spelling variations:
"proceso control statistical methodology." » "proceso control statistics methodology.", "proceso control statistical methods.", "process control statistical methodology.", "proceso contralos statistical methodology.", "proces contre statistical methodology."
"proceso contra estadisticas methods." » "proceso contra estadisticas metodos.", "proceso contra statistical methods.", "proceso contra estadisticas datos.", "proceso control estadistica methods.", "proceso economia estadisticas methods.", "proceso control estadistico methods.", "process 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: (("proceso control statistical methodology.") or ("proceso contra estadisticas methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("proceso control statistical methodology.") OR ("proceso contra estadisticas methods.")).
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• Adding a wildcard symbol may retrieve word variants: (("proceso control statistical methodology.") or ("proceso contra estadisticas methods."))*.