Perhaps you should try some spelling variations:
"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.", "proces contre estadistica methods."
"proceso contra statistical methods." » "proceso control statistical methods.", "process control 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: (("procesal control estadistica methods.") or ("proceso contra statistical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesal control estadistica methods.") OR ("proceso contra statistical methods.")).
• Removing quotes may allow a broader search: (( procesal control estadistica methods. ) or ( proceso contra statistical methods. )).
• Adding a wildcard symbol may retrieve word variants: (("procesal control estadistica methods.") or ("proceso contra statistical methods."))*.