Offset into all bound VBO's with a function call?

Is there a way to offset into a bound VBO? I am trying to use 16bit IBO to render my 513x513 terrain mesh with patches. My problem is the terrain is always rendering some polygons from the origin point… So from what I can tell I need to offset into the VBO to the location I need to render a 33x33 patch from that point and move on to the next location to render the same 33x33 patch again. I was told there was talk of this somewhere on the forums here… Thanks;f=3;t=012219