Perhaps you should try some spelling variations:
"process control estadisticas methods." » "process control estadistica methods.", "process control estadistico methods.", "process control statistical methods.", "process control estadisticas metodos.", "process control estadisticas datos.", "process control estadisticas medicas."
"procesos science statistical methods." » "procesos sciences statistical methods.", "procesos sciences statistics methods.", "procesos ciencias statistical methods.", "procesos serie statistical methods.", "procesos balance 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: (("procesos science statistical methods.") or ("process control estadisticas methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesos science statistical methods.") OR ("process control estadisticas methods."))*.
• Removing quotes may allow a broader search: (( procesos science statistical methods. ) or ( process control estadisticas methods. ))*.