Try setting
grid.TableStyle.WrapText = true;
For me using version 3.x, PrepareViewStyleInfo works to allow text to wrap and you can see it provided the row is tall enough to show it.
private void gridDataBoundGrid1_PrepareViewStyleInfo(object sender, Syncfusion.Windows.Forms.Grid.GridPrepareViewStyleInfoEventArgs e)
{
e.Style.WrapText = true;
}
Here is a sample.
http://www.syncfusion.com/Support/user/uploads/GDBG_MultiSelect_13c5c7fe.zip