Perhaps you should try some spelling variations:
"proceso digital statistical methods." » "proceso capital statistical methods.", "procesado digital statistical methods.", "proceso dificil statistical methods.", "processing digital statistical methods."
"processing data statistical methods." » "processing base statistical methods.", "processing capital statistical methods.", "processing health statistical methods.", "processing digital statistical methods.", "processing spain statistical methods.", "processing units statistical methods."

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

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