Perhaps you should try some spelling variations:
"procesos contables science ethnology." » "procesos sociales science ethnology.", "procesos penales science ethnology.", "procesos contables science methodology.", "procesos contables science sociology.", "procesos contables science biotechnology."
"process control statistical methods." » "proceso 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 ("procesos contables science ethnology."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control statistical methods.") OR ("procesos contables science ethnology.")).
• Removing quotes may allow a broader search: (( process control statistical methods. ) or ( procesos contables science ethnology. )).
• Adding a wildcard symbol may retrieve word variants: (("process control statistical methods.") or ("procesos contables science ethnology."))*.