the only street in amsterdan for shopping brand names is Hooftstraat.
it is very close to the museums, like Gogh museum or Rijksmuseum.
if you are interesedted in 風車..木鞋, you could go to flee market ( it is really cheaper)
regarding the the largest department is deBijenkork close to the central station, you could get a free map there.
I just went to amsterdan last week