I am no expert , but, the method I follow to select say 2 objects (in object mode of course) when they are close or are one upon another in the line-of-sigth we are seening then right clicking again & again at the same location will cycle through all the objects.
[>] There is a cool TIP for this problem while right-clicking to select objects press Alt KEY on ur keyboard then a pop-up menu asks for which object to select.
When in edit mode this same phenomenon happens for vertices also. When u keep on right - clicking at the same spot then all the vertices within resonable distance cycle & get selected one-by-one. (U don’t need to click exactly over a vertice, numerically clicking excatly over a vertice will be verrrry tough). Unfortunately there is no Alt+Right-click pop-up menu trick here but I goto to Solid view & now the vertices out of view r not selected (if u have not enabled the option to do so. The small cube on the 3d-window header must be pressed in).
Well I hope I understood ur question & have answered appropriately.