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."
"programming state statistics methods." » "programming state statistics methodology.", "programming software statistics methods.", "programming systems statistics methods.", "programming spain statistics methods.", "programming health statistics methods.", "programming chile 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: (("programming state statistics methods.") or ("proceso contralos statistical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("programming state statistics methods.") OR ("proceso contralos statistical methods.")).
• Removing quotes may allow a broader search: (( programming state statistics methods. ) or ( proceso contralos statistical methods. )).
• Adding a wildcard symbol may retrieve word variants: (("programming state statistics methods.") or ("proceso contralos statistical methods."))*.