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