Cidrei is right in that you sometimes have to know what you're trying to move, not just what you're looking at. For example with the CT buffs, you can move the individual buff frames around, but what you really want is the frame that "holds" all of those buffs, that's the CT_BuffFrame as Cidrei said. Sometimes the actual name of the frame you'll never be able to "grab" as it isn't truly visible to you. VisorGUI does show you the name of the parent of the frame you currently are targetting, sometimes that can be a big help since it's sometimes the parent that you can move to ge the results that you want. Unless the parent is, "UIParent" or "WorldParent". Don't move those.
Really though there's no easy way to be completely sure of what the frame name is that you need to move for some things, it depends entirely how they are coded and the coding style can vary greatly from person to version. The only way to know for sure is to dig into the XML itself and understand what frames are relative to what other frames.
Also you can't move the tooltip with Visor as it is a frame that gets re-anchored by the game itself constantly. There are some other small addons that can do this, I personally use
Tipster . That is all it does is relocate the tooltips for you, but still to a set of pre-defined locations. If you wanted it somewhere other than Tipster can do, I'm not completely sure what you'd have to do.