Perhaps you should try some spelling variations:
"competitive requirements case history" » "competence requirements case history", "composition requirements case history", "competitive procurement case history", "competitive requirements based history", "competitive requirements core history", "competitive requirements race history", "competitive requirements trade history", "competitive requirements state history", "competitive requirements life history"
"conjunctive management firm history" » "comparative management firm history", "conjunctive management from history", "conjunctive management five history", "conjunctive management fcm history"

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

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