Since I don't know this particular story, it might be a story that is specific to a certain community or area. It could be about a relationship between a Kabuliwala (someone from Kabul perhaps) and a Bengali woman. But without more information, it's hard to tell the full story.
I'm sorry, I'm not familiar with the specific 'kabuliwalar bengali bou' story. It might be a relatively unknown or regional story. You could try to find it in local libraries, ask local storytellers or search in specialized Bengali literature resources.
Unfortunately, without more context, it's difficult to provide the full story of 'bou kotha kou'. It could be a name of a story within a small community or an emerging piece of literature. If you could give some more details like where you heard it from or what kind of story it is (e.g. a love story, a mystery) it would be easier to answer.
It could potentially be a story about identity. The Kabuliwala may have his own identity shaped by his Afghan origin and the Bengali bou by her Bengali culture. Their story could explore how they maintain or change their identities while being involved with each other. Also, it could touch on themes of acceptance, where they either accept or struggle to accept each other's differences.
As I don't know the story, I can't say for sure. But likely the main characters are the Kabuliwala, who might be a trader from Kabul with his own cultural background and way of life, and the Bengali bou, who would represent the local Bengali culture and traditions.
The following are the recommendations of a few modern novels: " I Don't Want to Be Popular ": The story was about a big shot who became a billionaire after his rebirth. Every week, there would be a new big gift bag, including a super five-star hotel, office buildings, limited edition supercars, and so on. This novel was a modern urban novel. 2. " Rebirth and Revenge: The Poison Girl Returns ": This was a modern urban novel. After the female protagonist was reborn, she vowed to let those who had hurt her taste endless pain. This novel was the final short story of a serious revenge novel. 3. " Miracle Doctor of Space: The Strongest Reborn Queen ": The female protagonist Jiang Ning had the space of the immortal doctor. She took revenge and abused the scum to achieve hegemony. This novel was one of the recommendations of the female lead in the ending story of Modern Rebirth. These novels were all modern themed novels. Some of them were short novels that were suitable for readers who liked modern topics.