Is it possible? When I want to initiate a discussion, I'd try checking if the topic has been discussed before. How can I search by keywords within a specific SD? Similar to how one would do with the old-fashioned search in archives?
Topic on Talk:Structured Discussions
searching for possible past discussions
At the moment, it is not posible to search for specific discussions or archives. You can search on topics that exists, on a given page (« browse topics » under the page title).
We have open a global consultation about talk pages, where you can express your needs. Plus we look for volunteers to ask those questions on all wikis Maybe you could help for zh-yue? :)