Perhaps you should try some spelling variations:
"procesos contables statistics methods." » "procesos states statistics methods.", "procesos sociales statistics methods.", "procesos penales statistics methods.", "procesos contables statistical methods.", "procesos contables statistics methodology."
"procesos control estadistica methods." » "procesos control estadistico methods.", "procesos control statistical methods.", "procesos economia estadistica methods.", "procesos control estadisticas metodos.", "procesos control estadisticas medicas.", "process control estadistica methods.", "proceso contra estadistica methods.", "proceso contralos estadistica methods."

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"procesos contables statistics methods.\") OR (\"procesos control estadistica methods.\"))~".
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