I've accepted your answer because it's full of valuable info, even if it's not exactly for my problem.To solve my problem I ended up writing a custom suggester service that uses a query to create the suggestions.Thanks!

Hello.Firstly, thanks for your response.My goal is to have the OOTB Suggester service return only suggestions from my project instead of all the projects from the server.For that, I've tried about configuring the aforementioned cqPageLucene, but maybe I am going in this the wrong way?That being said...

Hi! I'm in bit of a dead end, and what i've read in the documentation here has not helped me much.I'm using the suggester OOTB service to get results, and right now  it's working but it's fetching suggestions from all kinds of different unwanted places.The server on which this AEM instance will run ...