Perhaps you should try some spelling variations:
"procesos contables statistical methods." » "procesos control statistical methods.", "procesos sociales statistical methods.", "procesos penales statistical methods."
"process control estadisticas metodos." » "process control estadistica metodos.", "process control estadistico metodos.", "process control statistical metodos.", "proceso control estadisticas metodos.", "procesal control estadisticas metodos."

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 estadisticas metodos.") or ("procesos contables statistical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control estadisticas metodos.") OR ("procesos contables statistical methods.")).
• Removing quotes may allow a broader search: (( process control estadisticas metodos. ) or ( procesos contables statistical methods. )).
• Adding a wildcard symbol may retrieve word variants: (("process control estadisticas metodos.") or ("procesos contables statistical methods."))*.