Threshold set to 0 not working as expected

[naira-petrosyan-m]

I am having trouble with understanding how threshold number works.
I have dataset like this:
[model: 'Account', title: 'Orama']

when I am trying
const results = await search(db, {
term: "account orama",
threshold: 0,
properties: ['model', 'title'],
});

this gives 0 results, but the documentation states that when that with threshold 0, the keywords can be found in different properties.
What is the correct behavior here?