Hi Bhanu,
HA350 is a proprietary document of SAP and it is illegal and unethical to freely distribute them or ask for them
Please delete your comments
If you want to leqarn about Data Provisioning, then you can check my blog for materials related to it
Most of the things covered in HA350 are present there
HANA Reference for Developers - Links and SAP Notes(Part-1) - Updated 04.12.2013
You can also check my blog regarding how to prepare for HANA Certification:
Prepare for SAP HANA Application Associate Certification
Regards,
Vivek