C# datagridview data search.

Question

I am using the RegisterUser form for recording data.

These are my recorded data shown below in the datagridview. now if I write a in the textbox I want to show the data of asif and abad. if I write as or asif then show the data of asif.if write j then show the data of john and julia. How can I do this. I want to show the full details of these searched names(ID,name,bloodgroup,address,cellno)