The default LOV's in APEX are implemented as a pop-up window, with the restriction that you can only show one display value. This is sometimes just what you need, but mostly it is not sufficient. You can create a longer display value by concatenating strings, but that won't enhance the looks of your application. What you do need is an LOV with multiple columns, more or less something similar as the LOV's you can get in good old Oracle Forms.
You can create an LOV Page for every LOV that you need and create a button with a link to that page for any item, but than you'll end up with lots of pages. Wouldn't it be better to use a similar feature as APEX itself has: Define an LOV query and attach that to an item?
A live demo and more details are available here.