Originally Posted by Samnang

It has no way yet to get khmer unicode on android due bug report by developer but we still remove the block sqare by doing so.
1. Root your device by using Z4Root (google to find it)
2. Download Khmer unicode ttf file and save to any location in your tab (if you can't find where to download you can copy this ttf font file from your pc "Khmer OS.ttf")
3. Download and install Root Explorer (google to find it) run this root explorer and copy your downloaded khmer os.ttf file to paste in system/font "make sure that you have touch mount R/W before touch PASTE
-after copy this ttf file then cut or delete one of the file DroidSanFallBack or DroidArabic from the font folder.
-rename Khmer OS.ttf to DroidSandallback.tff or Droidarabic.ttf

I just know that DAP-NEWS.com is using Limon font so you can repeat the step #2 by copy Limon S1 file to system/font and delete AndroisThai.ttf from the system/font then rename your copied limon s1.ttf to AndroidSTHAI.TTF

DONE and enjoy

Come again if you can't root your device. Do at your own risk..