When I typed the title I was directed to another question "Hindi display of words such as "pra" "gra"". My experience is somewhat different than discussed there. The display is correct in LibreOffice and Text Editor but not in browser search results page. Again if you click the link with incorrect display the actual website displays correctly. I experimented with copying the incorrectly displayed lines and pasted in text editor and it displayed correctly.
This problem seems to be only in Debian/Ubuntu and distros based on them. I have tried a few other distros like Fedora, Manjaro and Solus and everything is displayed correctly in them.