work visa in Hongkong

I don't think you can make it without your employer's help. You need to provide these documents: filled ID990A application form, recent photo affixed on the second page of ID990A form, Photocopy of your passport containing personal particulars, date of issue, date of expiry and/or details of any re-entry visa held (if applicable), Photocopy of proof of academic qualifications and relevant working experience.

On the other hand, your employer has to provide other documents to help you apply for it. You can visit the official website of HK Immigration Department for details.