Limit geocoding to specific AdministrativeAreaName

Is there any clever way to tell google geocoding api to narrow its search to a specific AdministrativeAreaName 开发者_如何学Python(or by any other criteria i.e. Country, SubAdministrativeArea etc) or would I have to manually sort results that are returned to me?

I think you can specify the region in the URL when you are making the Geocoding Request