the dialogflow browser is not detecting all the entities in the user entered text

In the image of your conversation in Dialogflow it shows that Dialogflow matched the user phrase to the movie intent. In your movie intent setup you have setup only 1 parameter, movies. Dialogflow will only recognize one entity because you have setup the intent to only look for 1 entity.

If you want the movie intent to be able to recognize both entities you should add a phrase that contains both a movies and a purchase intent and make sure both entities are available in the Actions and Parameters section of your intent.

Here is a quick example that detects a gender and an age category entity.