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."
"procesos control statistical methods." » "process control statistical methods.", "proceso contra statistical methods.", "proceso contralos statistical methods.", "procesos control statistics methods.", "procesos control estadisticas methods."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesos control statistical methods.") OR ("procesos contables science ethnology."))~.
• Removing quotes may allow a broader search: (( procesos control statistical methods. ) or ( procesos contables science ethnology. ))~.
• Adding a wildcard symbol may retrieve word variants: (("procesos control statistical methods.") or ("procesos contables science ethnology."))*.