Visa for Vietnamese to Hongkong and China

Dear All,

I'm Vietnamese, get married with Malaysian citizen. Can I do visa with multiple entries to these 2 countries ( 3 months at least) from KL? if yes, what documents needed?

I have been entered to China 3 times before and this trip I would like to stay longer in China but not flying back to Vietnam every 30 days.I'm thinking of dropping by Hongkong for passport chop as many people do but making visa to Hongkong from Vietnam is quite hetic. Alot of docs as long as financial involved...

Great to have some shares from you.

Jasmine