Perhaps you should try some spelling variations:
"procesos penales statistical methods." » "procesos problems statistical methods.", "procesos health statistical methods.", "procesos sciences statistical methods.", "proceso penal statistical methods.", "procesos contables statistical methods.", "procesos sociales statistical methods."
"process control statistical datos." » "process control statistical data.", "process control estadisticas datos.", "process control statistics data."

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 penales statistical methods.\") OR (\"process control statistical datos.\"))~".
• Removing quotes may allow a broader search: (( procesos penales statistical methods. ) OR ( process control statistical datos. ))~.
• Adding a wildcard symbol may retrieve word variants: (("procesos penales statistical methods.") OR ("process control statistical datos."))*.