I personally use a few ways:
1. By memory of the tracks
2. Searching track by track, album by album, library by library. As stated above, very time consuming but can bring results. I listen to various parts of each track as it is quite surprising how some can change quite a bit part way through.
If those fail, then I will use hxxps://x-minus.pro/ai to remove the vocals (if any) from the recording and try both the un-filtered and filtered tracks in the following:
3. Test them on the fingerprinter (as above), though I use the downloaded version
4. Try on shazam
5. Try on aha (hxxps://www(dot)aha-music(dot)com/identify-songs-music-recognition-online)
6. Try using Google Assist (on your android phone)
7. Convert the files to a video and upload to youtube
If all those fail, then No.8, I will save up a few and ask on here.