Currently, there is no feature that lets you sub-select search results.

There are a couple of work-arounds:

On my player, I work around this by tagging my tracks so that I can tell live versions and remixes from the original versions. For instance, I have:

Closer to the Heart
Closer to the Heart (Live)
Closer to the Heart (Live, DS)
(etc.)

This doesn't help if you've got several songs by the same title but are totally different songs. For instance, I have several songs named "Mother" on my player. The Police, Pink Floyd, Cyndi Lauper, etc. I haven't yet run into a situation where that's been a problem for searches, though.

The other work-around is to make your track selections from playlists. You can scroll through your playlists and locate the version of the track that you know is the correct one. Then, if you need to insert it, you can insert it using the hold-to-insert feature.