Vibration

Recently Bought a 1999 Honda CRV Auto. Shortly after I noticed that there was some vibration coming from the back of the car when accelerating. I spoke to the Honda dealer who serviced that car and they advised that the rear trailing arm bushes had split and needed changing. I got this done along with computerised alignment and 2 new rear tyres. The shaking has calmed down but is still apparant when accelerating up to 20mph then goes away. It is also there somthimes when I am cornering. I am now at my whits end can anyone help out or give me any advise.