Perhaps you should try some spelling variations:
"procesos sociales statistical methods." » "procesos sociology statistical methods.", "procesos sciences statistical methods.", "procesos science statistical methods."
"proceso control estadisticas methods." » "proceso control estadistica methods.", "proceso control estadistico methods.", "proceso control statistical methods.", "proceso control estadisticas metodos.", "proceso control estadisticas datos.", "proceso control estadisticas medicas.", "process control estadisticas methods.", "proceso contra estadisticas methods.", "proceso contralos estadisticas methods."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("procesos sociales statistical methods.") or ("proceso control estadisticas methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("procesos sociales statistical methods.") OR ("proceso control estadisticas methods.")).
• Removing quotes may allow a broader search: (( procesos sociales statistical methods. ) or ( proceso control estadisticas methods. )).
• Adding a wildcard symbol may retrieve word variants: (("procesos sociales statistical methods.") or ("proceso control estadisticas methods."))*.