weird issue with dictionaries

[malkavian-librarian]

In the original code there were 3 lines:

while any(results['domains'].values() + results['companies'].values() + results['emails'].values()):

The issue it ain't really working for me, as I am getting a parser error telling me it is not possible to use "+" with the dict keys and dict values.
I have resolved it in a 'noob' way (my Python ain't great) - I have just purged the second part as I am interested in domains more than emails:

while any(results['domains'].values())

But the way I understand it - it is not supposed to work this way. Did it change in Python 3.8 - I mean the work with dict values?
Thanks!