Perhaps you should try some spelling variations:
"procesos contables statistical methods." » "procesos control statistical methods.", "procesos sociales statistical methods.", "procesos penales statistical methods."
"process control estadisticas datos." » "process control estadistica datos.", "process control estadistico datos.", "process control statistical datos.", "process control estadistica casos.", "process control estadisticas metodos.", "process control estadisticas de."

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"procesos contables statistical methods.\") OR (\"process control estadisticas datos.\"))~".
• Removing quotes may allow a broader search: (( procesos contables statistical methods. ) OR ( process control estadisticas datos. ))~.
• Adding a wildcard symbol may retrieve word variants: (("procesos contables statistical methods.") OR ("process control estadisticas datos."))*.