I’ve ignored Obsidian’s search for quite while, but it’s actually surprisingly powerful, and really very helpful.

Search for entries with a link to GitHub but no github tag:

["link":"https://github.com"] -tag:github

Search for entries with a category of music:

["category":music]

Search for entries with a category of music, and a series of psalms:

["category":music]["series":psalms]

Search for archive entries with links, but no archive link:

["type":archive][links:"https://"]-["archive_links":"https://"]