I agree with @mglukhovsky for two reasons. Firstly, stylistically his tone is better. I'd even say "Use compound indexes to efficiently retrieve documents by multiple fields". Secondly, even if we supported multiple indexes in the same query, compound indexes allow to perform that operation much more efficiently (which is why other database systems implement both options). If you want to note that you can't currently use two indexes in the same query (which I think is a good idea) you could add that to the limitations.