Dude NepaliChora123,
Its not cybersansaar.. Its you who is pathetic, searching crap load of those sort of  words, if not exact, atleast similar, in google. The way it works is you search for something online and then the cookies get stored in your browser. And almighty google, relates the key words from the cookies and pops different ads every single time you open a web page tht has google adsense. Clear history and  cookies  and try searching for Nepali Byakaran, Nepali Literature and stuff.. your add will be full of those ...

Duderino