issue with KB not finding the info in the KB

I have noticed that the KB quite often doesnt find the answer to a question in the KB or doesnt retrieve the right chunk. So i have set up a test bot with only 1 text document. This document is a small list of businesses in a town, with a description and contact details for each. It has been structured with chatgpt in order to be presented in the most optimal way for embeddings. So u can have access to this simple text document in my project directly.
The project ID is 659eb64b59d399715077ad0c
lets concentrate on 2 business in this list with bad results (but ther could be plenty others potentially) : AFR performance offers sport coaching service, and "atelier Desbel" renovates armchairs. I am asking both "do u know AFR performance" , and "who can i contact if i need sport coaching", same for the other.
Result : the KB cant find any relevant info on both questions about AFR performance, even if i have added a second mention at the end of the document saying that "afr performance is providing sport coaching". About atelier desbel, if we ask who renovate armchair it will name another business which doesnt mention armchair renovation.
This is only a small example that should enable us to test and check where the problem should come from. But this issue happens very regularly, the KB retrieve a chunk which is not speaking about the question, when the appropriate one is somewhere else.
Please contact me for more test to solve this problem