Asian fonts don't show all chars

[javactive]

I am trying to use the following fonts for Thai language

"Taviraj"
https://fonts.google.com/specimen/Taviraj
"Pridi"
https://fonts.google.com/specimen/Pridi

The fonts "Taviraj" and "Pridi" works fine in the Browser but when using PdfKit with the font "Taviraj" to generated a PDF, the texts are missing chars. PdfKit with the font "Pridi" works fine.

Example Thai Text: ข้อมูลทัวไป

Is there a way to make it work with the font "Taviraj" ?

Thanks,
Oscar.