@tranminhhoainhan Which part exactly are you stuck on? The first thing you would need to do is have all the certificates that are needed by elasticsearch and kibana:
To get started I would recommend running locally odfe docker-compose file which created demo certificates by default (these should never be used in prod) and copying them from docker image.
Once you have that, you can follow the link you mentioned and update the community/open-distro-elasticsearch-kubernetes/elasticsearch/35-es-bootstrap-secrets.yml and …/kibana/25-kb-bootstrap-secrets.yml with the content of the relevant certificates. it should look something like this:
Once that is done the rest should work as mentioned in the link. I only tested on minikube however so had change a couple of files to find a workaround for PV and PVC etc, Let me know how you get on if you end up trying and if you need that workaround for minikubes as well.