Strata owners (or their agents) are entitled by law to see and copy any strata records.
Prospective purchasers and real estate agents are only entitled to see what the strata owner wants them to see (although the convention is that vendors give permission to strata search companies and lawyers to see their strata records).
Some companies will perform a strata search for one prospective buyer and then it sell to or share the costs with other buyers, which is good for the buyers and sellers alike as only one entity is doing the search.
Some real estate agents will supply strata searches but these tend to be very short on the kind of detail you really want – such as ongoing disputes, the emotional health of the community and plans to change by-laws in ways that might disadvantage you