Finding information on the Web is easy. Find the right information can take more time. Here are some suggestions to give you better results when you are looking for dance materials on the Web. A Google search on the term "dance" for example will give you a lot of commercial sites, but few of academic interest. If you are getting to many results that are not what you need, try doing an advanced search limiting to .edu or .org sites.
Follow the link and fill in your keyword(s) in the top box, such as "costume" for example.