Macau became a Portuguese colony in 1849. Its legal system thereafter was influenced by the civil law tradition.
China resumed sovereignty of Macau in 1999 with the undertaking that there would be "One Country, Two Systems" until 2049.
The LawBod does not have printed resources for the law of Macau.
If the Bodleian Libraries don't have the book you are looking for, we may be able to source it through Oxford's inter-library loan service.