The system does not categorize certain deep-discounted (e.g. Z class) fares as being Business-class. Therefore, when using the [Sabre: Fares/ZUJ] method, you have to select [Class] as "Economy" and turn on the [Max] option. You will then be able to get the complete listing (like the one humanoid94 had posted).
I have been messing with it all morning and was about to ask this very question. Thank you! Thanks to everyone for the answers..I know just enough to be very dangerous.