As of September, 2015, here are all articles on Larry's site which have 4 practice Vubridge deals available:

1NT Forcing

2/1 Game Forcing

2nd hand play

3rd hand play

4th suit forcing

After the Opponents Overcall

Avoiding Finesses

Balancing

Counting

Cuebids

Declarer Play: Trick 1

Defense Passive or Aggressive

Defensive Signals

Finding the Queen

Hand Evaluation

Lead-Directing Doubles

Negative Dbls

Redbles

Roman Keycard Blckwood

Suit Combinations

Suit Play Plan

Splntr Bids

Support Dbls

Takeout Dbls