Get multiple data from single string

I want to build bluetooth joystick remote for my bluetooth car.
For that i am using 2 arduino. One for my car and other for remote.Is there any way to get x and y data of joystick simultaneously on serial and convert into feed into other arduino over bluetooth?
I want precise x and y value and according to that i will set pwm of motors.

Is it the following that you want to achieve --

You have UNO-1 with 2-joystick and BT. You have also a remote car fitted with two PWM motors, UNO-2, and BT. You want to send the x-y positional values of these two joysticks (say: 1.25, 3.57 and 4.50, 2.3) from UNO-1 to UNO-2; UNO-2 will receive these values and then control the speed/position of the motors.

If the above paraphrase makes sense, please post a connection diagram of your setup.

I have 4 motors on car and one joystick in Remote

Have a look at the examples in Serial Input Basics - simple reliable ways to receive data. There is also a parse example to illustrate how to extract numbers from the received text.

The technique in the 3rd example will be the most reliable.

You can send data in a compatible format with code like this

Serial.print('<'); // start marker
Serial.print(','); // comma separator
Serial.println('>'); // end marker