Yes, that kind of searching for a position doesn't work.
However, you can search Hikaru's games for the Vienna Game opening. One of the search fields is for openings and I think that the Vienna is one of them. You can also search for games that he played as white or black.
So I'm looking for a position on the explorer because I want to study a certain opening, right? Master Games won't show casual games so I go into other players and look for say, Hikaru games.
Sometimes it even happens with my own games, I want to find games I lost with a certain openings and the explorer will just show I drew every single game
Am I doing something wrong or is it a bug that I need to report?