Perhaps you should try some spelling variations:
"proceso contra statistical methods." » "proceso control statistical methods.", "process control statistical methods."
"procesos tecnicas practicas methods." » "procesos tecnicas proyectivas methods.", "procesos tecnicas analiticas methods.", "procesos tecnicas basicas methods.", "progresos tecnicos practicas methods.", "procesos teorias practicas methods.", "propuestas tecnicas practicas methods.", "procesos tecnicas practicas letradas.", "procesos tecnicas practicas medicas."

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

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