Google can search for punctuation and other characters

Google search usually ignores punctuation and some mathematical characters, but lately it seems that the search algorithm has shrunk and you can search for these characters alone. For example (not including the left and right brackets): [.], [,], [:], [;], [#], [%], [@], [^], [)], [~], [], ["], [;], [$], etc.

　　

Google can search for punctuation and other characters.

For example, when you search [%], Google gives you a percent-character search result, and the search results are mixed in all languages because you only search for symbols, and Google doesn't know what language you're searching for.

Then, for example, when searching [:], Google gives a search result with a colon, and most of the search results are about human anatomy, which seems completely irrelevant.