Amazon sellers can cross-sell two products in a variety of ways to increase sales and improve product exposure.

Here are some strategies:

1. **Bundle sales**: Create a bundled product that includes two related items. For example, if you sell phone cases, you can sell them together with screen protectors.

2. **Cross-Selling**: Recommend another related product in the description of one product. For example, recommend buying a memory card on the camera description page.

3. **Up-Selling or Down-Selling**: If a customer is viewing a low-priced product, you can recommend a higher-priced product (up-selling); conversely, if a customer is viewing a high-priced product, you can recommend a cheaper product (down-selling).

4. **Use Amazon Advertising**: Promote your products through Amazon's advertising services, such as Sponsored Products or Sponsored Display Ads.

5. **Use product inserts**: Insert recommendation cards in your product packaging with information and QR codes of other related products. Customers can scan them and view or purchase them directly on Amazon.

6. **Build your own brand store**: Display all related products in one brand store and promote product combinations through in-store marketing activities.

7. **Optimize keywords**: Use relevant keywords in product titles, descriptions, and backend search keywords so that when customers search for one of the products, the other related product can also appear in the search results.

8. **Participate in Amazon's promotional activities**: Such as "buy one get one free" and "discount promotions" to attract customers to buy more products.

9. **Use Amazon's Detail Page Interactive Content feature**: Add interactive content such as videos and photo galleries on the product detail page to show different ways to use the product or how it works with other products.

10. **Social media marketing**: Post product use cases on social media to show the benefits of using two products together.

11. **Email Marketing**: Send emails to customers who have already purchased your product, recommending them to buy other products related to the product they have already purchased.

12. **Customer Reviews**: Encourage customers to leave reviews after purchasing two related products, which can be used as a reference for other customers.

When doing cross-marketing, it is important to ensure that the recommended products are related to the original product and have real value to the customer, so as to increase conversion rates and build customer trust. At the same time, comply with Amazon's rules and policies and avoid any illegal marketing practices.