Here are a couple of things that can be changed.
-The "navbits_start" icon in "misc" folder (VietNamese), can be replaced with the one from default Vb style.
-The first line under your Avatar, says: "Trạng thái

nline (or offline)". To replace that, go into "postbit templates", scroll the page down about 1/3 and find the followng code:
</div>
<div class="ac"></div>
<div class="am">
<div class="smallfont" style="padding-left: 7px;">
<br />
<div>Trạng thái: $post[onlinestatus]</div>
Replace the last line with this: <div>$post[musername] is: $post[onlinestatus]</div>
I am not a coder, so I do not know if this is all right. I just did it by trial and error (took to me about three hours to figure this little thing out, LOL).
-The thin gold line under the blue line, is where the forum description goes. In order to make the description visible, I had to use Microsoft Paint (this, only took a minute) to make it a little wider. Get the attachment under this post and place it in "misc" folder overighting the old one, or upload it to your server, replacing the old one in "misc" folder.