To search for a stock purchase request in the Store Module, please follow these steps:

1. Navigate to the Store Module and select "Request."
2. Click on "Purchase Request" from the available options.
3. Enter the Reference Number of the purchase request, if known.
4. Select the desired Date for the request.
5. Choose the Status of the request, such as "Open," "In Progress," or "Completed."
6. Click on the "Search" button to initiate the search.

By following these steps, you will be able to search for stock purchase requests based on the provided reference number, date, and status. The system will display the matching results, allowing you to view and manage the requested items accordingly.