Hello Vishnu!! Honeymoon in 30000 per person is a bit difficult task. But if you choose country as per the higher currency exchange and visa on arrival I would suggest you 3 countries. Cambodia and Vietnam are good choice but for honeymoon I wld say Bali is the best one. Visa on arrival and higher currencies exchange rate make this trip possible in 33k max. Look for my itinerary.
Hey Vishnu, I will recommend you to visit Maldives, Myanmar and Vietnam in this particular budget. I hope you will have a great international trip. For a couple, a Vietnam trip will cost you around INR 40000.