Google Places API text search within boundaries and outside 50 km radius

Is there any way to form a query that would look for places across a zone which is formed by geographic points and at the same time to have a search radius within that zone (especially if it extends 50 000 meters radius)? Basically that's the way how Google Maps work.

For instance, I'd like to find Apple stores within the visible part of the smartphone's screen boundaries.

I've looked for it in the docs first and didn't find a way to do so outside the 50 000 meters radius.

There were mentions about the business account at the forums which might extend the radius but again there's no information about how far it can be stretched and what's the price is going to be for this.

Thank you.

EDIT 1: Tried TextSearch and it returned points by the coordinates and it ignores 500 km radius though the docs says that it still will be limited. Now there's an issue that it might show some points outside the bounds which were given.

And in case of making a search query like: "Apple stores in USA", the coordinates are being ignored and it returns result across the country.

EDIT 2: Created the issue in Google Issue Tracker