Your question is very thin on details. You will have a greater success of experts answering if you share a bit more about what you're looking to learn.

You need to implement a document management system like hubdoc which can save all the vendor invoices directly into its system and then you can find all the invoices at one place.
See this.
https://www.hubdoc.com/how-it-works.

Get in touch at hello@meruaccounting.com we shall be glad to answer your specific questions free of cost.

We are a Firm of chartered accountants that specialize in bookkeeping for clients globally.

Cheers
Rushabh

The availability of invoices for transactions will depend on the specific accounting software you are using, as well as the policies of your business. But here are few steps you can refer to:
1)Check your accounting software
2)Check your email
3)Contact vendors directly
4)Maintain a physical or digital file management system
5)Consult with your accounting team or professionals
Keeping invoices in an organized manner, can simplify the process of finding them when needed.