Thanks for your answer.
I know there is a way to improve landings making changes in the plane but I would prefer rather some tips for flying well. As I said this problem occurs when I fly it , but some other people ( more experienced pilots ) can land it very well. The procedure some experienced pilots have told me is to put some up elevator just when front wheels of the plane hit the ground, this procedure is supossed to be the same as in take off. This sounded very strange to me and when I tried to do it, the plane would just take off again and I make a perfect touch and go.

what do you suggest??