Perhaps you should try some spelling variations:
competitive requirements » competence requirements, composition requirements, competitive procurement
comparative management » compensation management
requirements role » requirements core, requirements race, requirements power
practices theory » practice theory, practical theory, practices theories
role history » rome history, rhone history, some history

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 practices theory ) or ( competitive requirements role history ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( comparative management practices theory ) OR ( competitive requirements role history )).
• Adding a wildcard symbol may retrieve word variants: (( comparative management practices theory ) or ( competitive requirements role history ))*.