Perhaps you should try some spelling variations:
"proceso contralos estadistico methods." » "proceso control estadistico methods.", "proceso control estadistica methods.", "proceso contralos estadisticas metodos.", "proceso contralos statistical methods.", "proceso contra estadistico methods.", "proces contreles 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."

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