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