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