I've created product with variants. Example:

Mobile Phone Nokia

The variant of the product is:

Mobile Phone Nokia (Blue) (16 GB)

Mobile Phone Nokia (Red) (32 GB)

Mobile Phone Nokia (Blue) (1GB)

When I created an invoice of purchase for one of the variants, example Mobile Phone Nokia (Blue)(1GB),

The invoice item display as "Mobile Phone Nokia" not "Phone Nokia (Blue)(1GB)". How do I add the attribute (Blue)(1GB) description in the Item?