Perhaps you should try some spelling variations:
collaborative engagement » collaborative management, collaborative arrangements, collaboration management
objective required » objective review, objective requirements
required resources » related resources, liquid resources, required measures
resources history » resources sector
engagement der » engagements der, engagement bei, engagement die
der history » order history, der historie, heer history

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( collaborative engagement der history ) or ( objective required resources history ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( collaborative engagement der history ) OR ( objective required resources history )).
• Adding a wildcard symbol may retrieve word variants: (( collaborative engagement der history ) or ( objective required resources history ))*.