I found plenty of availability in both Economy & Business in the week beginning 11 March between Bangkok and Vientiane to take one routing at random. I'm not aware that you need a points balance to search although I think you have to be logged in. What browser are you using - Chrome is an absolute disaster for me but that's probably because I've got a lot of Do Not Track and other privacy add-ons? Epic is always pretty good, and the iPhone App is also responsive. You know you have to select "Star Alliance" not "KrisFlyer" when the results show up?