Hello @student-vn
Welcome to Steemit & Wish you luck - success with Steemit!
Currently, We're supporting for the Planktons by our small upvote. If you follow @haccolong you will get free upvote of 20 users. You may like it, Check statement here.
To get more 15SP delegate + 3000points and receive additional rewards from your activities on Steemit, you can use Partiko app for your phone.
Please ignore this reply if you do not need the above.