To perform an advanced search of your library you will select Library on the far left side under your Dashboard. 

Once you are in your Library you will select the Search Icon on the top right. 

This will bring up the advanced search menu. 

You can now refine your Keywords and ISBN search.  Search by title data, such as Fic/Non, Genre, Location, Page count, and Word count.  Search by Levels such as Interest, GRL, Lexile, and AR. Also, find books that are missing certain title data.