Perhaps you should try some spelling variations:
"collective l'engagement und history" » "collective management und history", "collective d'engagement une history", "collective engagements und history", "collective l'engagement du history", "collective l'engagement fund history", "collective l'engagement ind history", "collective l'engagement funds history"
"collective settlement e history" » "collective settlements e history", "collective agreement e history", "collective management e history", "collective settlement te history", "collective settlement _ history", "collective settlement a history", "collective settlement fe history", "collective settlement me history", "collective settlement 1 history"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("collective l'engagement und history") or ("collective settlement e history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("collective l'engagement und history") OR ("collective settlement e history")).
• Removing quotes may allow a broader search: (( collective l'engagement und history ) or ( collective settlement e history )).
• Adding a wildcard symbol may retrieve word variants: (("collective l'engagement und history") or ("collective settlement e history"))*.