Perhaps you should try some spelling variations:
"proceso blas estadisticas datos." » "proceso blas estadistica casos.", "proceso blas estadisticas metodos.", "proceso blas estadisticas de.", "proceso las estadisticas datos.", "proceso tablas estadisticas datos.", "proceso la estadistica datos.", "proceso la estadisticas datos.", "proceso notas estadisticas datos.", "proceso a estadisticas datos."
"process control statistical methods." » "procesos control statistical methods.", "procesal control statistical methods.", "process control statistics methods."

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

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