You have 5 days from receipt of the HOA documents to cancel the purchase contract if there is anything you do not like in the documents. There are rules on how to request the documents depending on the size of the HOA. Simplier, ask the Title Company to provide the documents. Because I am not aware of your entire situation, to achieve the best and correct answers, refer to your buyer's agent.
I wanted to follow on the previous comments to your question. The Arizona agents have provided excellent information on how the HOA docs can be obtained and you need to read them carefully. But Cindi brings up a good point about reading the HOA meeting minutes for items that may not yet be in the official documents. There is a condo association locally that is considering a multi-million dollar repair project, but since it has not been approved, it is only vaguely mentioned in the HOA documents. But if one were to request the meeting minutes, it would show thorough discussions over the past 6 months on how to proceed with the project. You can never have too much information...
First of all I hope you have a Realtor representing you in this purchase. I also hope you are using the Arizona Association of Realtors standard forms which gives you as a buyer rights to evaluate and reject if needed the HOA information. In the standard contract the seller is typically obligated to provide this information to you and then you have 5 days to disaprove.
You are correct to want this information and to evaluate the strength of the HOA.