Perhaps you should try some spelling variations:
"procesos tablas estadisticas methods." » "procesos tablas estadisticas metodos.", "procesos tablas statistical methods.", "procesos tablas estadisticas datos.", "procesos las estadisticas methods.", "procesos nuevas estadisticas methods.", "procesos tecnicas estadisticas methods.", "proceso blas estadisticas methods.", "procesos contables estadisticas methods.", "procesos teorias estadisticas methods."
"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."

Try widening your search to All Fields.

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