Able to join the game via hamachi's IP, but the LAN server does not show up on the LAN list in games

Does it mean there is something wrong on our end (I play with my GF) or it's something wrong with the game itself? We can play without any problems when using Hamachi's IP however, the hosted games do not show up on the LAN Lists in games. We'd like to find the fix for that since some of the games doesn't allow pasting IP to join the game.