ASCII to Unicode conversion not working for some PDF text

[pavamana1123]

Thank you very much for the converting tool. It's a very useful one. But I am having an issue in converting Kannada text in some pdfs. I am attaching one such pdf and sample output. Could you please help me out?

Eg:
Input text copied:

Ascii text: ù<j‹Ûj !<j"Ao;j
Converted output from the tool: ್ಱ<ರಿ‹್ತರಿ !<ರಿ"ಂo;ರಿ

PDF used: bhagavad-gita-yatharoopa.pdf

Thank you.