To do that you need a nail and dome or domeless nail, and torch to add to your bong so you can use concentrates. Since you don't have that equipment , yes like smoking hash with knives, get a knife heat it up till red, let it cool off for like 15-30 seconds then place the bit of concentrate on knife careful not to get burnt, and suck in all the smoke preferably from a funnel so you get all the smoke