Perhaps you should try some spelling variations:
"proceso control estadistico methods." » "proceso control statistical methods.", "proceso control estadisticas metodos.", "proceso contra estadistico methods.", "proceso contralos estadistico methods.", "proces contre estadistico methods."
"process control estadistica methods." » "process control statistical methods.", "process economia estadistica methods.", "process control estadisticas metodos.", "process control estadisticas medicas."

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 estadistico methods.") or ("process control estadistica methods."))~.
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• Adding a wildcard symbol may retrieve word variants: (("proceso control estadistico methods.") or ("process control estadistica methods."))*.