how concentrate on my study and to making my career.

Your body and your mind associate activities with certain places. Studying in bed is a bad idea, because when you get in bed your mind thinks "sleep".  Studying in front of the TV is bad, because usually TV-watching is for when you are trying to relax. Studying at the dining room table can be bad, because sitting there usually means eating. You need a very quiet place too. If your friends or family are being loud or they are watching TV or something nearby, you won't be able to concentrate. Find a corner of your house, or a closet, or somewhere, where you can set up a small table or desk with a lamp. Don't play any music that has lyrics while you are studying, either, because lyrics are distracting.