Google books API returns nothing

Hi, I’ve been working on a Bubble project for a while using the Google Books API. I’ve noticed that sometimes the API just doesn’t return any response.

For example, I’ll enter a search term for a book (I know exists) and the API returns an empty list. A few hours later when I enter the same search term the API will return the list of results.

I really want to roll out my application but don’t feel like I can rely on this API, does anyone have ideas for what could be happening or how I can get around this?