what are your comments about HHL Phd program?

Please also guide for Good Research proposals with high acceptance rate.

It depends on your goals. if you want to work in German academia, then it's not a great option. I think there are lots of great books on writing good research proposals, but high acceptance is about whether your school has a potential supervisor who is working on your topic or in your theoretical framework. If you don't already have supervisors identified, then I don't really see the point in applying to any excellent business school.

thanks Duncan!
i want to work in Asia,
Source of Good research proposal? i will work on any topic.@Duncan you are HHL alumni,plz guide .

If you want to work in Asia as an academic, then take your PhD at a school with a higher profile in Asia. if you don't want to be an academic, don't take a PhD. If you don't know what you want to research, take a masters in research for a year and refine your proposal in the context of a business school with a strong research setting. Look for something like http://www.business-school.ed.ac.uk/msc/msc-by-research

For tips on writing a proposal, then see https://www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=how%20to%20write%20a%20phd%20research%20proposal