Perhaps you should try some spelling variations:
"procesos bases estocasticas methods." » "procesos bases estocasticos metodo.", "procesos bases estadisticas metodos.", "procesos senales estocasticas methods.", "procesos costes estocasticos methods.", "procesos interes estocasticas methods.", "procesos basicos estocasticas methods.", "procesos basados estocasticas methods.", "procesos claves estocasticas methods."
"process control statistical methods." » "proceso control statistical methods.", "procesal control statistical methods.", "process control statistics methods.", "process control estadisticas methods."

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 statistical methods.") or ("procesos bases estocasticas methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control statistical methods.") OR ("procesos bases estocasticas methods."))*.
• Removing quotes may allow a broader search: (( process control statistical methods. ) or ( procesos bases estocasticas methods. ))*.