Off-topic with same search box
85532
Could normal users have an easier way to flag for migration?
143725
How to search multiple sites at once?
87227
How should off-topic questions be flagged when no off-topic reason from the dialog applies?
23899
Related questions in "Ask Question" page is better than the search tool
92491
Do we need a more generic "off-topic" close reason?
146149
How to share a question on different related SE sites?
61980
Is there a way to perform a search in such a way as to exclude a specific tag?
20138
Allow cross-posting of questions to more than one SO site
70650
Can you add a separate discussion site?
142919
Is there a system in place to prevent new users asking, answering and accepting answers to each others' off-topic questions?
11795
Stack Exchange: Block a site in "Filtered Questions" filters, or add a select all
147570
Mark questions as duplicate of tag wiki
135791
Should I prevent search engines indexing tag/category pages?
97367
Displaying the same title search results from "Ask Question"
47476
Is it possible to exclude questions I've already answered from the search criteria?
7142
Showing meta questions in the same manner as linked and related questions
153457
Search on specific content