Open your skins_site/def/static/results_user.html file and add the following line into the list of profile fields to be displayed:
<p class="info text"><span>{profile.f29_label}</span>: {profile.f29}</p>
After editing this file in order for any changes to take effect you must regenerate your skin in .... Admin >> Site Setup >> Skin Settings >> and then click Regenerate under your default skin.