Why is Search restricted to 4+ letters?

[Kage72]

I saw in the announcements that... Changed BGM for Trumpy and Concealed Peak.

So, i decided instead of making a whole post to ask what this is, I'd just run a search for BGM and see what it means. But, I can't. :/ I just see NO reason to have a 4 letter min.

P.S. Anyone know what BGM means?

[ARWINDER]

i think BGM means BackGround Music

[UzumakiW]

I'm assuming they do this to narrow down results more.