Apply for Multiple Entry Visa

Sir/Ma’am,
Good day.
I am Myanmar passport holder, working in Malaysia Shipping Company as Superintendent.
I was already enter to Hong Kong 3 times to join ship when i was seafarer.
But now my responsible vessel Harbour Star is always enter to Hong Kong every two week.
Sometimes I need to go Hong Kong very urgently & surely needs to apply visa at Hong Kong Embassy (KUL).
So, I would like to enquire that i can apply Hong Kong multiple enter visa or not?
If yes, what are the major requirements?
Best Regards
Koung Nyan Win