Hi Amir,
The GUI is provided as the default way to browse the datasets at the Azure market place and it has limited features to query and filter the dataset. Mostly, the datasets will be used in applications or tools, queried using OData query methods. You could
learn how the OData query methods work and use the dataset url to access the datasets in your application. If you are using VisualStudio then you could check this out "http://msdn.microsoft.com/en-us/library/gg312152.aspx"
Please let us know if you need further assistance.
Regards