Hongkong & Macau tourist visa

I am Vietnamese living in South Korea. I have a plan to travel to Hongkong and Macau in the end of September for 5 days totally.
Can I apply for Hongkong and Macau entry permit at the same time at Chinese Embassy in South Korea?
What kinds of documents do I need to prepare for both entry permits? How long will it take for my case?
My flight ticket will be S.Korea - Hongkong and return ticket Hongkong-S.Korea, and accommodation is all in Hongkong. I plan to go to Macau from Hongkong and back to Hongkong by ferry in a day, without staying overnight in Macau, is it possible to get the Macau entry permit if I don't have hotel booking and transportation ticket for Macau?
Hope to get your answer as soon as possible to prepare on time. Thank you.