Plotting Native Nations on Filled Maps

I am trying to chart on a filled map the Native Nations that we serve and highlight the reservations in our region. The Bing data has only identified 5 of the 23 Nations I am trying to link and the map doesn't provide any meaningful information of these 5 when that data is isolated. This is more of a request for Microsoft to include more data on Native Nations in their search capabilities than an ask of how to chart this data using Filled Maps, but if anyone knows how to identify reservations using filled maps, please let me know!