HeinOnline is the world's largest collection of law and law-related material. The database contains more than 25 million pages in image-based (pdf) format and is updated continously.
This subscription database includes more than 4,000 judicial decisions on human rights topics issued by international and regional tribunals and by national courts. Begin by selecting “human rights” from the Subject menu in the blue navigation bar. Then search by keyword or use the filters on the left to narrow.
Westlaw International is a comprehensive full text database with British and American legislation and legal usage as well as a large number of legal English-language full text journals (circa 700), Legal Journals Index and Index to Legal Periodicals. You will also find EC-legislation and legal usage, international agreements, and legal documents from Australia, Hong Kong and Canada. Access through lubsearch under the tab "databases" and serach for Westlaw in the search field.
Boolean logic defines logical relationships between terms in a search and are necessary for effective searching of online databases.
The Boolean search operators are and, or and not. You can use these operators to create a very broad or very narrow search.
More in-depth information available here.