Is there any way to view the stars even in a cloudy sky? For example by using a particular camera, or a particular UV filter in front of the camera, and so on.
Have a look at the liquid water absorption spectrum across a wide wavelength range:
As long as you are not observing from from space, there is always some water vapour along the line of sight to a star. Depending on the thickness of the cloud cover and the brightness of the stars, it may be possible to view some of the stars.