Perhaps you should try some spelling variations:
"a private investor perceptions series" » "a private investor protections series", "a private investor protection series", "a private investor relations series", "a private investor perceptions survey", "a private investor perceptions versus", "a private investor perception survey", "a private investors perceptions series", "a private investment perceptions series"
"costs private sector perspectives series" » "costs private sector perspective series", "costs private investor perspectives series", "costs private teacher perspectives series", "cost private sector perspectives series", "losses private sector perspectives series", "bonds private sector perspectives series"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("a private investor perceptions series") or ("costs private sector perspectives series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("a private investor perceptions series") OR ("costs private sector perspectives series")).
• Removing quotes may allow a broader search: (( a private investor perceptions series ) or ( costs private sector perspectives series )).
• Adding a wildcard symbol may retrieve word variants: (("a private investor perceptions series") or ("costs private sector perspectives series"))*.