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 statistics methodology."
"proceso control statistical methods." » "process control statistical methods.", "proceso contra statistical methods.", "proceso contralos statistical methods.", "proceso control estadisticas 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 contables statistics methods.") OR ("proceso control statistical methods."))~.
• Removing quotes may allow a broader search: (( procesos contables statistics methods. ) or ( proceso control statistical methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("procesos contables statistics methods.") or ("proceso control statistical methods."))*.