I have just joined into the bounty program, please show me some good bounty! thank you very much 
Man you really want to be spoon fed in here? You said that you just joined into bounty program so you know how and where to see those bounty threads. To make your search easier this is the place where you can see and look on your own those good and bad Bounties (Altcoins).
Yes, good and bad bounties not all of them are legit and others can be a scam so do your own research.