Hi @otvthaidang,
Kindly note that integration between MasterStudy LMS and WooCommerce only works with MasterStudy LMS Pro plugin is activated. Since you are making request here, it seems you have only the free version of plugin.
For Pro version, when WooCommerce checkout option is enabled, we use WooCommerce just as a payment gateway. Since LMS courses are not products, their catalog visibility will be hidden. If the issue is regarding WooCommerce, you can reach to WooCommerce support as well.
If you have Pro version of MasterStudy LMS, you can create a ticket with your question in our platform, so we will investigate. Because, according to WordPress forums policy, it is better not to discuss commercial products here.
Best regards