Campaign Negative Keywords Performance Report is for negative criterion or structure report and do not hold any statistics for negative keywords. Filtering the report by date range wouldn't be of much help. You could use the
CustomerSyncService to retrieve the changed entities for a customer account or campaign based on the given date range.
CustomerSyncService.get() returns all the changed entities in a customer account.
CustomerChangeData contains information about the changed information, both at Campaign level and AdGroup level. At the Campaign level,
CampaignChangeData holds information about a changed campaign and underlying groups that have been changed. At the AdGroup level,
AdGroupChangeData holds information about a changed AdGroup.