London to Vienna stopping at Bruges & Cologne

Hi,
So pleased that your website is still up and running as you've given me invaluable advice in the past. Thank you!
We are finally able to travel again and looking to train from London to Vienna with over night stops in Bruges & Cologne at the end of April. We will then spend two weeks travelling through Austria - Krems, Lintz, Salzburg to finally fly home from Munich.
Is it possible to book London to Vienna on one ticket with stop offs and diversions? We would like to visit Bruges & Cologne staying 2-3nights in each. I realise that we'd have to change trains at Brussels to get to Bruges or you might suggest a different route.
Thank you