Perhaps you should try some spelling variations:
"communicating requirements _ history" » "communicating measurement _ history", "conflicting requirements _ history", "communication equipment _ history"
"comparative management features study" » "compensation management features study", "comparative management measures study", "comparative engagement features study", "comparative management figures study", "comparative management lectures study"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("comparative management features study") or ("communicating requirements _ history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comparative management features study") OR ("communicating requirements _ history")).
• Removing quotes may allow a broader search: (( comparative management features study ) or ( communicating requirements _ history )).
• Adding a wildcard symbol may retrieve word variants: (("comparative management features study") or ("communicating requirements _ history"))*.