What we can do is try searching for all of the words, so perhaps you'll find something useful that way. But even we can tell when doing this that the results might not be what you want, which is why that automatic warning about maybe these aren't great matches.
IE: we can't show you what we've got for a query where there are no exact matches. It's impossible. We can show you what we got if we don't require all the word be present. And we can tell you what we're doing. And you always have the choice to restart the query in another way if you don't like that.
Now here's something else. You probably used the quotes because I'm guessing you figured it was better to tell us exactly what to do than trust us to look at all the words and analyze the context and so on and see if we could make matches generally. If you had done that, just searched for [kitchen boss g320 disassembly], then the first web page result is the instruction manual for your sous vide machine. It has cleaning steps, which I'm guessing also might be what you're after? (It looks like it's just take off the outer casing).
Those results, doing it directly like that, are different than when we gave them to you after your quoted search failed. and that's probably because when you gave us quotes, and there were no matches, we might have tried some stricter matching to keep closer to the original requirements rather than use our general ranking.
To wrap up: maybe don't try the quotes at first. It's totally fine to type in a long natural language query like [how do I take apart a kitchen boss g320] and if you do that, the instruction manual is right there.