I doubt the Google DNS servers are your ISP's DNS servers so you should be good. Just to be sure though you can disconnect from Boleh VPN, and run the DNS leak test again so you can see what DNS servers your ISP uses. Those DNS servers detected when you are not connected to Boleh are the ones your ISP use. When you run the DNS Leak Test again when connected to Boleh it should show different DNS servers than those of your ISP. If it shows the same DNS servers when connected, and disconnected from Boleh then you have a DNS leak. I hope that makes sense.