Hello Ayon Parvez Turzo re: "...major writings about the "Stranded Biharis in Dhaka"' You query is too open-ended. Can you focus on some aspects of the topic and tell us what sources you have tried? The "Persecution of Biharis in Bangladesh" entry on Wikipedia offers some 60 or so references. Have you accessed the "Bangladesh Genocide Archive" or the "Hamoodur-Rahman Commission report?"
Ayon Parvez Turzo I would need to know your academic research question. I think your search term may be TOO NARROW (not too broad). It looks like you are researching immigration problems in Dhaka Bangladesh? Here is a newspaper article: https://www.dhakatribune.com/bangladesh/2022/03/06/pm-hasina-government-plans-to-improve-life-for-stranded-biharis-in-bangladesh
A better source would be academic papers - here is one good academic paper about immigration problems in Bangladesh, and from their references you can see many other good papers: