Like all the other games talked about I just do a search on the psn store and they are not even there...
The only thing I could think of for not having them is because I am on a Japanese Vita with a US account and now located in Europe. Or I dunno... It's so odd though.
Tokyo Jungle search for example gives me 5 paint park sticker items, a talkman travel Tokyo (psp game) and nothing relevant afterwards.
So for me the flash sale consists of : Retro City Rampage, When Vikings Attack, Urban Trial Freestyle, Everyday Shooter and Gex : Enter The Gecko
Well, that is weird.
I am located in Europe (So my main PSN account is EU) and i had bought 10 games from US account today using 10$ psn card purchased from Amazon US. Try using the webstore - link given in the OP.