You should always start your foreign law research with a guide to researching the law of that country.
Generally, the most current and useful guides are those in NYU Law's GlobaLex series:
GlobaLex also includes a general guide to foreign law research that is a good starting point if you have not researched foreign law before:
There are also several other free country-by-country guides to legal research:
Finally, the UCLA Law Library purchases three subscription guides to foreign law research: