The course search is rather limited in the app at the moment, so we recommend searching for courses on the website. Any course you learn on the website will sync to the app.
To search for more courses on the website, on the Courses tab page, first select the source language under 'I speak':
Then, select the language/topic you want to learn, either from 'Top Categories' on the left or 'All Categories' below it. You can filter results by adding a keyword (e.g. intermediate, advanced) in the search box on the top right:
If there are words/items you've learned already, you can skip them using the 'ignore' function. This is not yet possible in the app, but you can do so on the website and it will sync to the app.
How to ignore words/levels