The minutes of the owners corporation and executive committee will tell you most of what you need to know, along with the original strata management statement. There are firms that specialise in strata searches but you probably need to tell them how much detail you need.
In simple terms, they will tell you what problems there are now and have been in the past. But they will have to dig deeper to find issues that may arise in the future (like the FlatChatter who wasn’t told that the apartment she bought for herself and her cat was about to be in a pet-free building). The vendor of a unit usually provides the permission for strat searches – it’s harder when you want to do a search before there’s actually an apartment for sale.