[tonfa]

In that case it isn't clear why an app named "child books" should be on top. It's a very generic name.

[wilfra]

Right. The reason they can't do that is because people can easily game the system by just naming their apps popular search terms.

It's the same reason simply owning 'thing.com' doesn't make it your rite to be ranked #1 in google for 'thing'.