If you’re not an expert researcher or if you don’t have access to a large law library with professional foreign and international law librarians, the key to productive legal research is the “Legal Research Guide,” most of which are created by those professional and expert law librarians, many of whom also have US and foreign law degrees.
For example:
1) NYU’s GlobalLex (sample Researching Canadian Law)
2) You can also visit the Law Library of Congress
3) You can search the web using keywords like legal research guide [country name]
4) Or, visit just about any law school library’s foreign and international legal research website. (Don’t forget to check the websites for law libraries in other countries.)