'a=a+b&b=b+c' => [('a', 'a b'), ('b', 'b c')]
'a=1&a=2' => [('a', '1'), ('a', '2')]
'Hbc5161168c542333633315dee1182227:key_store_seqid=400006&cuyer=r&view=bustomer&order_id=0bb2e248638833d48cb7fed300000f1b&expire=964546263&lobale=en-US&kid=130003.300038&ss=env'
'group_id=5470&set=custom&_assigned_to=31392&_status=1&_category=100&SUBMIT=Browse'