Perhaps you should try some spelling variations:
"procesos sociales statistical methods." » "procesos sociology statistical methods.", "procesos sciences statistical methods.", "procesos science statistical methods."
"procesos control statistics methods." » "procesos control statistics methodology.", "procesos control statistical methods.", "procesos control estadistico methods.", "procesos control estadistica methods.", "process control statistics methods.", "proceso contra statistics methods.", "procesos contables statistics methods."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesos control statistics methods.") OR ("procesos sociales statistical methods."))~.
• Removing quotes may allow a broader search: (( procesos control statistics methods. ) or ( procesos sociales statistical methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("procesos control statistics methods.") or ("procesos sociales statistical methods."))*.