Perhaps you should try some spelling variations:
"process control semiotics methodology." » "process control statistics methodology.", "process control economics methodology.", "process control service methodology.", "proceso control semiotics methodology.", "procesal control semiotics methodology."
"procesos problems statistical methods." » "procesos process statistical methods.", "procesos penales statistical methods.", "procesos problems statistics methods.", "procesos problems 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: (("process control semiotics methodology.") OR ("procesos problems statistical methods."))~.
• Removing quotes may allow a broader search: (( process control semiotics methodology. ) or ( procesos problems statistical methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("process control semiotics methodology.") or ("procesos problems statistical methods."))*.