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