Perhaps you should try some spelling variations:
"proceso control statistical estudios." » "proceso control estadistica estudios.", "proceso control artisticas estudios.", "process control statistical estudios.", "proceso contra statistical estudios.", "proceso contralos statistical estudios."
"procesos penales statistical methods." » "procesos problems statistical methods.", "procesos health statistical methods.", "procesos sciences statistical methods.", "proceso penal statistical methods.", "procesos contables statistical methods.", "procesos sociales statistical methods."

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

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