Where the bloody hell is Philip Hughes a house hold name, I mean seriously where. At a guess I'd say one is more famous in Australia and the other more famous in Sri Lanka.
There's probably more articles on Kohli than Chandimal because one's got god knows how many one day tons, averages over 50 and has been round quite a while and the others been around 5 minutes, I don't think that one's too hard to get my head round.
Not sure what your talking about as far as Warne and Murali goes, no one's ever said Warne's wickets against England have more value to them or anything like that. The only thing is they were taken in Ashes Series, so they tend to get remembered by the English and Australians and every time a series comes round they get talked about and clips are played on TV etc. The only thing they have going thing more than other wickets is bragging rights and that's because of the history that goes with the series, nothing more.
Why is it hard to understand that media in the Countries that you mention, pump up their own players, it's just the norm, you get it in every sport where there's a large media industry. Why not go and read more SA media and you'll see them hype their own players up as well.
By the way, Lillie's name gets brought up by all the best batmen in that generation he played in, as being the best around, maybe just maybe it isn't down to the media at all and players tend to get rated about right when their career is all done and dusted.