In our team, we have docs all around the place. Internal wikis, readmes, GitBook etc. The only search you get is going to that website on search there. How do

In our team, we have docs all around the place. Internal wikis, readmes, GitBook etc. The only search you get is going to that website on search there. How do you handle this in your team? Do you use some software that allows you to search across all different sources?