Well, I don't have any of my Geog things with me on my laptop so I can't help you with the actual information. I can tell you some of the case studies I studied for my exams and maybe you can look them up. I know, not helpful really but still. Anyway you'll find Vietnam in there a lot, but I don't suppose you will be using those.
Population, Resources and Development:
Post WWII development in Japan
Sustainable development in Vietnam
Population: population control methods in: Italy, Singapore (pro-natal) and China, Vietnam (anti-natal). China is a bit cliched actually. Singapore actually went from anti-natal to pro-natal so that was interesting.
Water resources: Three Gorges Dam Yangze River in China, Arial Sea (lack of water resources)
Food resources in Africa
(I found that in my class we only studied mainly water and food resources which was really risky because we got an oil and energy resources question on our exam that obviously we couldn't answer, so it's good to have a case study on that as well)
Lithospheric hazard and mass movements:
Human impacts on mass movement in the Alps (skiing)
Kobe 1995 earthquake (MEDC)
Banda Aceh 2004 Earthquake and tsunami (LEDC)
Mt. St. Helens 1980 eruption (MEDC)
Mt. Pinatubo 1991 eruption (Philippines LEDC)
Rivers and their management:
Three Gorges Dam in the Yangze River (China)
Mississippi
Hoa Binh HEP Dam in Vietnam
The River Tee in England includes many fluvial features and is a good case study for fluvial features
Globalisation:
Tourism in Vietnam and South East Asia
Anti-globalisation : North Korea (I love this case study, shocking view into North Korea)
Some multi-national corporations: Sony, McDonalds, Huyndai