Perhaps you should try some spelling variations:
"competitive requirements based history" » "competence requirements based history", "composition requirements based history", "competitive procurement based history", "competitive requirements basic history", "competitive requirements case history", "competitive requirements race history", "competitive requirements bad history"
"comparative management practice theory" » "compensation management practice theory", "comparative management practices theory"

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