Perhaps you should try some spelling variations:
"proceso contralos statistical methods." » "proceso control statistical methods.", "proces contreles statistical methods.", "procesos contables statistical methods.", "process control statistical methods.", "process controllos statistical methods."
"proceso contra values methodology." » "proceso contra based methodology.", "proceso contra policies methodology.", "process control values methodology.", "proceso contra valor methodology."

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

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