Stock photos to adobe express

I just start testing the premium adobe express and i found that i can search and import a photo from the "photos" section, but it is not that convienient on searching,. 

I try to go to the stock photos site and add them to my library. from there i can see them through adobe exrpess but if i add them from there, they are added with watermark. 

There is a way to find the same photo i see in stock site on adobe express app (i try searching by name but did not work) 

Thank you