Absolutly not...the blue hippo tangs require a much larger tank than what you have. Minimum 75 gal if I remember right, and I believe 100+ is recommended.
On the yellow tangs, your tank is too small for 1 yellow tang, let alone 2 of them. No wonder they are fighting.
I'm not trying to sound harsh, but if you want to keep tangs happy and healthy, you need a much larger tank.