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Can you help me correct this? I know something is wrong. Thank you!

Other grammatical errors are also appreciated

They had never in their life imagined, that they would be exposed for something of that kind: Two buglers had broken in to their apartment on fifth floor and emptied for everything, they had even removed the furniture’s. It had been some kind of nightmare to come home, and they where still not over the shock yet. When they had told their son about, had he just laughed and said: “Those are things that can happen”.
Comments  
Hi Cloudshaper, and welcome to the forums.

I've highlighed the things that I saw that needed correcting. Why don't you try to fix them, and let us know if you are stumped.

They had never in their life imagined, that they would be exposed for something of that kind: Two buglers had broken in to their apartment on fifth floor and emptied for everything, they had even removed the furniture’s. It had been like some kind of nightmare to come home, and they where still not over the shock yet. When they had told their son about, had he just laughed and said: “Those are things that can happen”.

(P.S. I hope they wrote their son out of their will. Things like that don't happen to anyone *I* know!)

Also, idiomatically, I've heard "Things like that happen." Your sentence is correct grammatically, however.
CloudshaperTwo buglers had broken in to their apartment ....

It must be "burglars", not "buglers".
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They had never in their life imagined that they would be exposed for something of that kind: Two buglars had broken in to their apartment on fifth floor and emptied it for everything; they had even removed the furniture. It had been like some kind of nightmare to come home, and they where still not over the shock yet. When they had told their son about it, had he just laughed and said; "Things like that happen."

this is my best shot...

had he just laughed and said:

in presence: He just laughed and said;

But it's pluperfect and I don't know how to get it right. Is it: he had just laughed ?
I'd just use simple past: He just laughed and said, "Things like that happen."

But if you DO want past perfect, "He had just laughed and said, "

Generally, use a comma after the word "said" before you start the quote. Mary said, "Where is my lamb?"

And yes, burglar. Note the other R. (Thanks Rish, I should have highlighted the whole word.)
Thank you very much!

is my corrections right?

imagined - no comma

emptied it for everything;
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No comma after imagined.

They emptied it OF everything.