Sometimes, they attract people by offering links to other home pages or databases. You can log on and find out all about NFPA, but you can also find links to interesting legal sites and databases. Here's where you enter into the strange gray area between skill and pure luck. Each database has its own criteria for searching. I suggest any time you visit a new database, you use its help or tutorial program to become familiar with their search criteria.
Databases use booleans logic to link words and phrases and combine terms.
You'll be much more successful with your medical searches if you talk the same language as the database you use. Just because you find something using the Internet doesn't mean it's timely, accurate or even true. If you're using information acquired via the Internet for a law suit, you need to make sure that information can be authenticated and that you can get a hard copy to use as an exhibit. If you have the article site, you can call your local library to find out if it has the publication you want, or you can search the Internet for the home page for that specific publication. This is the University of California Berkeley's online Internet training program.