Perhaps you should try some spelling variations:
"comparative management based history" » "compensation management based history", "comparative management case history", "comparative management best history", "comparative management board history", "comparative management bad history", "comparative management basic history"
"competitive procurement reference theory" » "competitive procurement references theory", "competitive procurement experience theory", "competitive procurement evidence theory", "competitive procurement preference theory", "competitive procurement references theorem"

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 based history") or ("competitive procurement reference theory"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comparative management based history") OR ("competitive procurement reference theory"))*.
• Removing quotes may allow a broader search: (( comparative management based history ) or ( competitive procurement reference theory ))*.