If you cannot access the root installation folder due to administrative restrictions, use these alternative workarounds:
If you have this file and need to use it in your CAD software, follow these steps: Tai Font Vn-uni.shx
Even with the font installed, you might need to adjust the text style: in the command line. Find the text style used in the problematic text. Change the font to Tai Font Vn-uni.shx Summary of Essential Vietnamese AutoCAD Fonts If you cannot access the root installation folder