As the topic says, it would be great with a search box in Marketplace on the UnrealEngine launcher.
Hope this can be done 
This has been most asked request that we’ve receive for the Marketplace and we are definitely listening. Due to high demand, we’re currently working on bringing the web features to the launcher, including search, ratings, and comments. So, keep your eye and ears opened for any updates. 
Sounds great, looking forward to that.