[yegg]

Not sure what is going on with those URL params, but I see results just fine at https://duckduckgo.com/?q=site%3Atass.com and in any case an easier way to do things is to not use a site search but just put the domain or name in the query like 'ukraine tass' and something from that site will usually come up on top.

[crtasm]

GP's links include a filter for "past month".

[yeahman]

I don't. I can't get a single hit on duckduckgo from tass.com. I tried "site:tass.com bucha" and variations there of.