There is a lot of useful information in the item record, which is what you see when you're browsing the search results. If you view the full record, you can click on different fields. For example, the author field will show you more work by that author, the journal field will show you other articles in the same publication.
If you've found at least one relevant article or book, skip to the end and browse the bibliography or references. This is a really easy way to find more items on the same topic.
Use Google Scholar's "Cited by" link to find out who cited the relevant work. You can also click on the author's name to see their other works.