PhpMyAdmin got 404 not found error on nginx ubuntu 16.04

Hello Digital Oceans, I’m using ubuntu 16.04 and configured LEMP with this tutorial on it. I tried to add phpMyAdmin with this tutorial , but when I tried to access /phpmyadmin route, I got 404 error. here is my default site-available config file:

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        root /var/www/html;

        index index.php index.html index.htm index.nginx-debian.html;

        server_name **My_IP_ADDRESS**;

        location / {
                try_files $uri $uri/ =404;
        }

        location ~ \.php$ {
                include snippets/fastcgi-php.conf;
                fastcgi_pass unix:/run/php/php7.0-fpm.sock;
        }

        location ~ /\.ht {
                deny all;
        }
}

Am i miss something? Thank you, JavaDroid :)