Perhaps you should try some spelling variations:
"proceso control statisticals methods." » "proceso control statistical methods.", "proceso control estadistica methods.", "proceso control estadistico methods.", "process control statisticals methods.", "proceso contra statisticals methods.", "proceso contralos statisticals methods."
"procesal control statistics methods." » "procesal control statistical methods.", "procesal control estadistico methods.", "procesal control estadistica methods.", "procesal control statistics methodology.", "process control statistics methods.", "social control statistics methods.", "proceso contra statistics methods."

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