Hi Faizal,
Thanks for your interest in Syncfusion products.
You can use the cell type combo box. In that you can find searchable combobox and you can save that value in data base also.
This combobox supports Editable, Autocomplete and exclusive.
For further details refer this link
Help Link Please let us know if you need any other details.
Regards,
Vijay Sankar.S