Hard to really explain my tricks for this game...
All I can say is plan ahead. If you think you can set something up that'll get a good combo in the next 5-10 moves, do it, even if it seems a bit risky.
Also, pay attention to the 'next' and always look for a better option. You're not timed or anything, so take as much time as you need. Do it like this and you should at least be able to hit bone, all the way up to nuggets if you're lucky.