I am not blaming India for Nepalese problem. Actually problem of human trafficking in India is worse in India than in Nepal. Lots of Indian women are trafficked within India.

India has signed international law against human trafficking and has established many institution to deal with it but the net result is zero.

Because of this ineffectiveness of Indian bureaucracy Nepal is suffering. As I mentioned earlier it is not possible to completely stop the trafficking but it is possible to reduce to the extent that it is no longer a threat.

India has  Border security force at every 5 Kilometer of Indo Nepal border. India claims it has far better security apparatus than Nepal. Main cities where Nepalis women are trafficked are Bombay, Calcutta and Delhi . Obviously these cities are ruled by the law and do not allow red light but still everything is happening. I as a Nepali just asking India to play its role as it agreed by signing the international law. 

It is the responsibility of India to stop illegal activities within its territory. India must reduce its  illegal demand for Gals. 

Its like this if there is no demand for Drugas of abuse in US where the Mexican drug lords will supply the drug?

It is the job of US government to reduce the demand of Drugs within its territory. legalizing pot was one of the steps taken lately. otherwise if there is Demand there will be supply too.

So It is the Indian government job to 1. To Reduce the demand  and 2. stop the illegal trafficking within its border. 

As far as I understand OP's intention is also the same, they can do better.Otherwise who will believe presence of a civil society in India ?