Q.Garden Grass Is Not Growing Well.
Its been three years since I planted this grass and we use to seat in it almost 4 months in a year. Now its bot growing well at few spots. What should I do to cover it fully?

Certified GKH Gardening Expert
It looks like you will have to improve drainage, since it appears compacted and very wet. You will, likely, have to kill off a mild infection. Fungicides will do the trick.
Here are some articles that will help:
https://www.gardeningknowhow.com/special/organic/how-to-easily-improve-your-clay-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/how-to-improve-clay-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/yard-drainage-problems.htm
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm