Mamuang, there are always some that bloom, but not necessarily the same ones from year to year. I can't say for sure, but I'm supposing it may depend on things like the nutritional stores built up, the weather that spring, and maybe even the weather conditions of the year building up to the spring. They also usually take a year off right after they've been divided.
It's not like I put a lot of effort into them each year. Part of the reason I've planted so many bulbs and rhizomes is that they can survive a certain amount of neglect. Once they've had their initial weeding for the year, the perennial beds always seem to be at the bottom of the list when it comes to giving them care, mainly because they don't threaten to die on me if I don't pay attention to them 'right now'.
I used to have 32 various flower beds. I think I'm down to around 15 lower care ones right now. Once I get the trees I've planted the past two years established well enough that they can handle less watering and summer care, maybe I'll be able to spend more time on the beds.