Perhaps you should try some spelling variations:
"problemas contextos statistics methodology." » "problemas contextos semiotics methodology.", "problemas contextos linguistics methodology.", "problemas contextos museisticos methodology.", "problemas contexto artistico methodology.", "problemas concretos statistics methodology.", "problemas candentes statistics methodology.", "problemas internos statistics methodology."
"process control values methodology." » "process control based methodology.", "process control policies methodology.", "process control andes methodology.", "process control cafes methodology."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("problemas contextos statistics methodology.") or ("process control values methodology."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("problemas contextos statistics methodology.") OR ("process control values methodology.")).
• Removing quotes may allow a broader search: (( problemas contextos statistics methodology. ) or ( process control values methodology. )).
• Adding a wildcard symbol may retrieve word variants: (("problemas contextos statistics methodology.") or ("process control values methodology."))*.