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