Perhaps you should try some spelling variations:
conflicting requirements » containing requirements, communicating requirements, cooling requirements
conjunctive management » comparative management
measures historical » features historical, causes historical, measures history
requirements based » requirements basic, requirements case, requirements race
based history » case history, bad history, basic history

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( conjunctive management measures historical ) or ( conflicting requirements based history ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( conjunctive management measures historical ) OR ( conflicting requirements based history )).
• Adding a wildcard symbol may retrieve word variants: (( conjunctive management measures historical ) or ( conflicting requirements based history ))*.