Level of detail of OSM in India

I am doing PhD on Transport Network Analysis and it’s efficiency in Murshidabad District, West Bengal, India. Unfortunately the level of road detail in this region is not good. The minor streets or roads are not added in OSM. Is there any way to get such data in OSM? What should I do??

You can do it yourself, all start info is in the Wiki
https://wiki.openstreetmap.org/wiki/Beginners%27_guide