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