i am trying to read the data from the serial window, by that, i'm referring to the data found in the red square in the attached picture(the 2 words: "fake!" and "found!!").
i read about all the relevant functions in the Stream class which none of them seems to be effective in my scenario.
If you want an Arduino program to send data to a PC and then have the PC do something with that data you will need to write a program for the PC to receive and act on the Arduino output. This demo of PC to Arduino comms using Python may be of interest.
If you just want to save the Arduino output to a file on your PC you could do that with a different terminal program such as PuTTY rather than the Arduino Serial Monitor. There are several suitable terminal programs available.