Lan
Doesn't sound as though you know much about helicopters. Well, neither do I, but one thing I do know is that the rotor on the back isn't used for steering. (It's used for pointing the body of the helicopter, which isn't the same thing. Helicopters bank in the direction they want to turn in.)
The ones that don't have a rotor on the back come in two flavours. One has a hole in the tail with a 13-blade fan in it, and that's called a fenestron. Helicopters like this are made in Europe. You probably don't mean this one, though.
The other system is called NOTAR (NO TAil Rotor). The tail, which is a lot thicker than usual, has air blown through it by a fan just behind the main rotor (you can't see it unless the machine is stopped and you have a stepladder). Some of this air comes out of a slot that runs the length of the tail. This makes the downdraught from the main rotor curve round the tail making it act like a wing and pull in one direction, against the twist from the rotor. For fine adjustment, the rest of the air comes out of a thrust-vectoring nozzle (just as you thought) right on the end of the tail. That system comes from the USA.