New playlists.

I have this problem of creating a new playlist but only having a handful of songs on it simply because I'm very picky about the way they coincide. My playlist is supposed to have one specific sound which, I know, makes it all that hard to find other songs to add on to it. I have a "2017 late night LA" playlist and it has a grand total of three tracks. Its supposed to have that 2017 feel without being released in 2017. Not even 2016, 2018, or even 2019. And now I have to search everywhere for songs that have the same feel as the three tracks I created a playlist for.