Don’t be shy about using the additional filters in the library. (Show More Filters). One filter that people have asked for is the ability to search by provider, which you will find there.
You can also click on the provider name in the library to find their contributions.
Unfortunately this leads to an error. I’ve emailed Alex about this problem 2 or 3 days ago. You get an “Oops!” because the hyperlink is wrong. It is “http://www.lingq.com/profile/VeraI/%20class=” for example and that doesn’t work.
Vera, what leads to an error for you? Is it clicking on the provider name, or using the drop list under More Filters? Which language? Which provider?Which browser?