Perhaps you should try some spelling variations:
"proceso control estadisticas methods." » "proceso control estadistica methods.", "proceso control estadistico methods.", "proceso control statistical methods.", "proceso control estadisticas metodos.", "proceso control estadisticas datos.", "proceso control estadisticas medicas.", "process control estadisticas methods.", "proceso contra estadisticas methods.", "proceso contralos estadisticas methods."
"procesos tablas statistical methods." » "procesos tablas estadisticas methods.", "procesos base statistical methods.", "procesos familiar statistical methods.", "proceso blas statistical methods.", "procesos contables statistical methods.", "procesos teorias statistical methods."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("proceso control estadisticas methods.") or ("procesos tablas statistical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("proceso control estadisticas methods.") OR ("procesos tablas statistical methods.")).
• Removing quotes may allow a broader search: (( proceso control estadisticas methods. ) or ( procesos tablas statistical methods. )).
• Adding a wildcard symbol may retrieve word variants: (("proceso control estadisticas methods.") or ("procesos tablas statistical methods."))*.