Perhaps you should try some spelling variations:
"proceso contexto linguistico methodology." » "proceso contexto linguistics methodology.", "proceso contexto linguistica metodologia.", "proceso contextos linguisticos methodology.", "proceso contacto linguistico methodology.", "proceso conflicto linguistico methodology.", "proceso continuo linguistico methodology.", "propio contexto linguistico methodology.", "proceso contralos linguistico 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 contexto linguistico methodology."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("process control statistical methods.") OR ("proceso contexto linguistico methodology.")).
• Removing quotes may allow a broader search: (( process control statistical methods. ) or ( proceso contexto linguistico methodology. )).
• Adding a wildcard symbol may retrieve word variants: (("process control statistical methods.") or ("proceso contexto linguistico methodology."))*.