Perhaps you should try some spelling variations:
"comparative management sciences history" » "compensation management sciences history", "comparative management science history", "comparative management evidences history", "comparative management scientist history", "comparative management societies history", "comparative management prices history"
"competitive procurement case history" » "competitive procurement costs history", "competitive procurement law history", "competitive procurement laws history", "competitive procurement trade history", "competitive procurement state history", "competitive procurement life history"

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 sciences history") or ("competitive procurement case history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comparative management sciences history") OR ("competitive procurement case history")).
• Removing quotes may allow a broader search: (( comparative management sciences history ) or ( competitive procurement case history )).
• Adding a wildcard symbol may retrieve word variants: (("comparative management sciences history") or ("competitive procurement case history"))*.