Perhaps you should try some spelling variations:
"private information professional series." » "private information processing series.", "private information professional services.", "private information professional ethics.", "private information professional schools."
"credit information provision series." » "credit information processing series.", "credit information provision versus.", "credit information provision scenarios.", "credit information supervision series."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("private information professional series.") or ("credit information provision series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("private information professional series.") OR ("credit information provision series."))*.
• Removing quotes may allow a broader search: (( private information professional series. ) or ( credit information provision series. ))*.