Perhaps you should try some spelling variations:
"proceso contralos statistical methods." » "proceso control statistical methods.", "proceso contra statistical methods.", "proces contreles statistical methods.", "procesos contables statistical methods."
"procesal control estadisticas methods." » "procesal control estadistica methods.", "procesal control estadistico methods.", "procesal control statistical methods.", "procesal control estadisticas metodos.", "procesal control estadisticas datos.", "procesal control estadisticas medicas.", "process control estadisticas methods.", "social control estadisticas methods.", "proceso contra 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: (("procesal control estadisticas methods.") or ("proceso contralos statistical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesal control estadisticas methods.") OR ("proceso contralos statistical methods."))*.
• Removing quotes may allow a broader search: (( procesal control estadisticas methods. ) or ( proceso contralos statistical methods. ))*.