I think asking for assets/asset sites is off-topic, but there's a glimmer of an on-topic question here about asset terminology. ("I don't know, what I can Google, or how these sounds are called.")
If I interpret your question as "What are the terms used for sound effects like placing blocks in games?"...
Then I think the word you're looking for may be "foley." This is used to refer to all the incidental sounds of action & movement in the game world, like footsteps or rustling & jangling of clothing/armor, or the impact sounds when an object strikes/lands against another surface.
A good foley kit will usually have a bunch of combinations like "impact, wood, soft" "impact, wood, heavy" "scrape, metal, medium" or maybe even destruction sounds like "crumbling stone"
Of course, that assumes you're looking for a sound based in physical intuition about familiar materials. Since it's a game, we can control the world however we like, and decree that "placing a block" sounds like that sound old CRT televisions made when you turned them off, and "destroying a block" sounds like opera singing. If you're going super-imaginative with your sounds though, there's probably no one term that would encompass everything you're looking for, so you'd need to specify a lot more precisely what you want these things to sound like in your game world.