Perhaps you should try some spelling variations:
"procesos contables statistical data." » "procesos control statistical data.", "procesos sociales statistical data.", "procesos penales statistical data.", "procesos contables statistics data."
"process control statistics methods." » "process control statistical methods.", "process control estadistico methods.", "process control estadistica methods.", "process control statistics methodology.", "proceso control statistics methods.", "procesal control 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: (("process control statistics methods.") or ("procesos contables statistical data."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control statistics methods.") OR ("procesos contables statistical data.")).
• Removing quotes may allow a broader search: (( process control statistics methods. ) or ( procesos contables statistical data. )).
• Adding a wildcard symbol may retrieve word variants: (("process control statistics methods.") or ("procesos contables statistical data."))*.