This could just be a checkbox by the search box. Or there could be 2 fields to type in. One would be "artwork with all of these tags" and the other would be "artwork with any of these tags."
Additionally, I think it would be helpful if an advance search was added.
Example, say I want to look at male characters, but only wolves and foxes. I could enter in something along the lines of "male AND (wolf OR fox)" to find only male characters that are either wolves or foxes.
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