Some libraries deal with countries like Canada, U.K., Australia, New Zealand, Germany, etc.
Some deal with subject matter like Corporations, or Employment Law. Some deal with Periodicals or News. BUT the problem is that you may also be charged for each database you enter and for each search that you perform. It may be cheapest to search only the smallest database that you think is necessary rather than the more general databases that include 100's of databases within them. For example, the database MEGA includes all Federal and state case law.