Perhaps you should try some spelling variations:
"proces chile estadisticas methods." » "proces chile estadisticas metodos.", "proces chile statistical methods.", "proces chile estadisticas datos.", "proces chile statistics methods.", "proces ice estadisticas methods.", "proces de estadisticas methods.", "prices chile estadisticas methods.", "places chile estadisticas methods.", "problems chile estadisticas methods."
"process control statistics methods." » "process control statistical methods.", "process control estadistico methods.", "process control estadistica methods.", "process control statistics methodology.", "procesos control statistics methods.", "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 ("proces chile estadisticas methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control statistics methods.") OR ("proces chile estadisticas methods.")).
• Removing quotes may allow a broader search: (( process control statistics methods. ) or ( proces chile estadisticas methods. )).
• Adding a wildcard symbol may retrieve word variants: (("process control statistics methods.") or ("proces chile estadisticas methods."))*.