Invoice System Tutorial Question

Good Afternoon,
I have a question about the video posted by KIMTOOFLEX. I followed the tutorial from the Bunifu Invoice System and I cant get my code to search for in the client table. It looks just like the code in the video and I always get no results. Your help would be greatly appreciated

This is the video I’m referring to

Here is my code:

 void loadClients()
        {
            
            gridClient.Rows.Clear();
            List<Models.Client> clients = BunifuMapper.MapToList<Models.Client>(db.GetRows("select * from clients where 'ClientName' LIKE '%" + txtSearch.Text.Trim() + "%'"));
            
            foreach (var client in clients)
            {
                gridClient.Rows.Add(new object[] {
                    client.id,
                    client.ClientName,
                    client.Address,
                    client.PostalCode,
                    client.Country,
                    client.City
                });
                
                gridClient.Rows[gridClient.RowCount - 1].Tag = client;

                
            }
        }