We're trying to book a flight from Amsterdam (Netherlands) > New York (stayover 1 week) > Brazil (stayover 2 weeks) > Amsterdam (Netherlands).

However, each time our routing goes on the return back via the USA, while we would prefer a direct flight on the leg Brazil > Amsterdam. Is there a specific OTA or search engine that allows us to force this, or is it likely to be a rule of the airlines to only specific direction travel?

Example: https://www.kayak.co.uk/flights/AMS-...AMS/2016-08-29

Thank you.