This question already has an answer here:
I have the weird habit of really enjoying Business class flights while not wanting to spend all of my money on flight tickets.
As of now, I have always been using Google Flights or ITA Matrix to search for Business class connections from my hometown to an airport close to my destination, and then book a cheap economy carrier to my destination, or book a cheap economy carrier to a close country in Europe and then take a business class flight to my destination.
ZRH (Zürich, Switzerland) -> PTY (Panama City, Panama) in Business.
PTY -> BOG (Bogota, Colombia) in Economy.
ZRH (Zürich, Switzerland) -> PRG (Prague, Czech Republic) in Economy.
PRG -> HND (Tokyo, Japan) in Business.
Is there any search engine that lets you search for this kind of combinations without entering manually all the stopover possibilities?
I don't think it's a duplicate, because the linked question is asking for flight options in premium economy when possible, economy when not. I am specifically asking for the possibility to define business for the longer leg, and eco for the shorter, whilst not having to search every stopover destination by hand.