The various browse options are listed on the top right of the left-hand navigation bar.
Browse by community/collection
This link will display the full hierarchy.
The other browse options
The other browse options will allow you to browse the content. You can switch between browse lists, and choose different ordering and display options or jump to a specific location within the list.
Date issued vs date submitted
The date issued is the date the work was first made publicly available, for example the date it was published in a journal.
The date submitted is the date the item was archived within HZI Open Repository. If the item has not been published before the date issued and date submitted dates will be the same.
Browse within communities and collections
Each community and collection has additional browse options within it. Browsing a community will also browse any sub-communities or collections within it. Just click on the community or collection that you want to browse.