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 state statistics methods." » "procesos state statistics methodology.", "procesos spain statistics methods.", "procesos health statistics methods.", "procesos chile statistics methods.", "procesos serie statistics methods.", "procesos software statistics methods.", "procesos durante statistics methods."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("procesos state statistics methods.") or ("proceso contralos statistical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesos state statistics methods.") OR ("proceso contralos statistical methods.")).
• Removing quotes may allow a broader search: (( procesos state statistics methods. ) or ( proceso contralos statistical methods. )).
• Adding a wildcard symbol may retrieve word variants: (("procesos state statistics methods.") or ("proceso contralos statistical methods."))*.