I'm not sure you can any more. Two problems:
1) Once upon a time, the Filter option in search results had more options including as least some date narrowing. Now, someone thinks it is a good idea to reduce the filter options to only document types:
2) Support articles get frequent updates that affects the date published. Even a formatting change seems to do that. That can make finding older versions difficult to impossible
3) Id newest articles are of special interest, this third-party sites lists the latest article within a couple of days:
https://www.xlr8yourmac.com
Responders here are not Apple but rather other end users, so we are unable to tell you Apple's reasoning behind this change.
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