Government of Canada Publications Catalogue Advanced SearchThis is a link to their advance search option.
Below are some suggested search strategies that can be used In advance search - under "subject:". It should be noted that putting in the more general term, ie "law", may not bring up all the more specific terms ie "family law".
"justice system", "crime". "organized crime", "crime prevention", "violence", "policing", "police services", "weapons", "victims", "young offenders", "courts", "law", "international law", "civil law", "family law", "criminal law"
In "basic search" under "title" you can try more general terms such as "law" and that up not just documents that have the word "law" in the title but also apparently anywhere in the description, etc.