Perhaps you should try some spelling variations:
competence requirements » competency requirements, compliance requirements, competitive requirements
conjunctive management » comparative management
requirements resource » requirements before, requirements core, requirements measures
management heer » management wheel, management career, management helped
resource sector » resource center, resource centers
heer history » theory history, gender history, war 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 heer history ) or ( competence requirements resource sector ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( conjunctive management heer history ) OR ( competence requirements resource sector )).
• Adding a wildcard symbol may retrieve word variants: (( conjunctive management heer history ) or ( competence requirements resource sector ))*.