Perhaps you should try some spelling variations:
conflicting requirements » containing requirements, communicating requirements, cooling requirements
conjunctive management » comparative management
requirements basic » requirements based, requirements case, requirements etsi
research history » research theory, research sector
basic history » basics history, baltic history, asia 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 research history ) or ( conflicting requirements basic history ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( conjunctive management research history ) OR ( conflicting requirements basic history )).
• Adding a wildcard symbol may retrieve word variants: (( conjunctive management research history ) or ( conflicting requirements basic history ))*.