The classic search experience is coming back with the May 2019 Update, and with new features — Here are the steps to get started.
Once you upgrade to the Windows 10 May 2019 Update (version 1903), you'll notice something different in the taskbar. You'll see a search box and a Cortana button next to it. This is because starting with this new major release, Cortana and Search are becoming two separate features, which means that the classic search is coming back.
Full story from the WindowsCentral blog...