LangChain Hybrid Search low retriever scores

Hello guys.

I was looking at Run a Hybrid Search Query and i’ve seen that the retrieved scores in the provided example are really low, eg:
Search score: 0.019230769230769232
Vector Search score: 0.01818181818181818
Total score: 0.03741258741258741

I’d really like to know the reason for those scores, where can i find an explanation?