I can not receive radio waves using LM386?
1) The first schematic is not correct, the second one is close to being correct.

2) The combination of C2 &amp; L1 have to be resonant at your desired receive frequency.

3) The cathode of the diode (connected to pin 3 of the chip) needs both a pull-down resistor to ground and a small capacitor to filter out the received RF.  I'd start with 10k and 1nF but you may need to experiment.

4) This circuit will receive AM signals, not FM.  It should work well for the AM broadcast band of 560 KHz through 1.6MHz.

5) You may need to increase the gain of the LM386.  Read the datasheet to learn how to do this.