How to assert a JSON response which have results in random order everytime ?

If all else fails you can write a Groovy Script step that plucks these values out of this step's response and looks at each one.  To make this easier, Ready!API provides a "Get Data" feature that's pretty slick.  To use it, first run your test step that gets this JSON response.  Then create a Groovy Script test step, and in the text field for that, right click, and select "Get Data".  Then just follow the menus to the value you want.