You can search online for more than 100 million publications using over 30 different website search engines. Simply choose the website you want to search for publications from the top Search Bar in Library and press enter. The Library will search and list the publications.
You can add those publications into the library by dragging and dropping them to the left tree. Or you can click on the "+" button to add individual publications to library. You can also choose to add all the listed publications by clicking on the "Add All" button in the upper right corner of listed publications.
The search lists the first set of publications, you can further load more search results by clicking on the "Load More" buttons at the bottom of the search results.