Perhaps you should try some spelling variations:
"process control estadisticas methods." » "process control estadistica methods.", "process control estadistico methods.", "process control statistical methods.", "process control estadisticas metodos.", "process control estadisticas datos.", "proceso control estadisticas methods.", "procesal control estadisticas methods."
"procesos control estadisticas methods." » "procesos control estadistica methods.", "procesos control estadistico methods.", "procesos control statistical methods.", "procesos control estadisticas metodos.", "procesos control estadisticas datos.", "proceso contra estadisticas methods.", "procesos contables estadisticas methods.", "proceso contralos 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 estadisticas methods.") OR ("procesos control estadisticas methods."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"process control estadisticas methods.\") OR (\"procesos control estadisticas methods.\"))".
• Removing quotes may allow a broader search: (( process control estadisticas methods. ) OR ( procesos control estadisticas methods. )).
• Adding a wildcard symbol may retrieve word variants: (("process control estadisticas methods.") OR ("procesos control estadisticas methods."))*.