Hi @Quang_Thai_Duy
Welcome to the forum
this topic has been marked as resolved, generally it’s better to create a new topic if you want to continue the discussion 
But the answer to your question is that we only provide the swagger ui out of the box for the Camunda Run distro. For spring boot you’ll need to add it yourself.
Luckily @Jean_Robert_Alves has actually spent some time getting this working so you can take a look at what he has been able to build.