Perhaps you should try some spelling variations:
"proceso contralos statistical methods." » "proceso control statistical methods.", "proceso contra statistical methods.", "proces contreles statistical methods.", "procesos contables statistical methods."
"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."

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 penales statistical methods.") OR ("proceso contralos statistical methods."))~.
• Removing quotes may allow a broader search: (( procesos penales statistical methods. ) or ( proceso contralos statistical methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("procesos penales statistical methods.") or ("proceso contralos statistical methods."))*.