Hi @Support_Goodness_Lov thanks for another interesting question 
We released this in June: June Development Update so now is a good time to revisit it.
First of all, because you want multiple matches, enable multiple setting on the website text command. See screenshot below:
Then, use the "Select from website" button. Note that this will now highlight multiple matches on the target webpages. You can hold Shift key on your keyboard, and then click to toggle parts of the webpage (to include them or remove them). You will see the same guiding text in the popper:
After you create your desired selection, you will get a list output like this: ["Product 1", "Product 2", "Product 3"]. To create your desired string output, you need to do this:
Replace the site command with your site command:
{=join({site: text; selector=...; multiple=yes}, "BLAZE_AND")}
As an example, this is how it will appear:
{=join(["Product 1", "Product 2", "Product 3"], "BLAZE_AND")}
Given your specific information, I think this will work for you:
{=join({site: text; page=https://secure.goodnesslover.com/wp-admin/*; select=ifneeded; selector=.wc-order-item-name; multiple=yes; trim=yes}, "BLAZE_AND")}
But I still mentioned all steps above for you in case it doesn't work for you
Let me know if it works for you! 