Perhaps you should try some spelling variations:
"proceso control statisticals methods." » "proceso control statistical methods.", "proceso control estadistico methods.", "process control statisticals methods.", "proceso contra statisticals methods.", "proceso contralos statisticals methods."
"procesal control estadistica methods." » "procesal control estadistico methods.", "procesal control statistical methods.", "procesal economia estadistica methods.", "procesal control estadisticas metodos.", "procesal control estadisticas medicas.", "process control estadistica methods.", "social control estadistica methods.", "proceso contra estadistica 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: (("procesal control estadistica methods.") OR ("proceso control statisticals methods."))~.
• Removing quotes may allow a broader search: (( procesal control estadistica methods. ) or ( proceso control statisticals methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("procesal control estadistica methods.") or ("proceso control statisticals methods."))*.