Hello can you purchase single campaign of Sc2 Zerg(Heart of The Swarm& Legacy of The Void prottos Campaign

Hello I have a question sorry for spamming can you purchase starcraft 2 Heart of The Swarm and Legacy of The Void campaign I have the money bout 50 euroes

I only wan’t single player campaign or campaigns? Heart Of The Swarm(Zerg campaign) and Legacy of the Void (protoss campaign)

I have 50 euros

Could someone please provide an answer to this? I have the same issue. I bought Wings of Liberty 14 years ago and played the campaign. I also played Heart of the Swarm campaign. Would it be possible to purchase Legacy of the Void without having to buy the whole 3 campaigns, given that I already bought the first?