The minimum number for all cories is 6. These fish live in shoals of hundreds in the wild so they have a hard wired need to be in a group. Albino cories could be one of two or three species, make sure you get more of the same one. You could also get non-albinos of the same species if you'd prefer.
I don't know why cories aren't in the fish database. Over 10 years ago they were - they was an entry 'cories' which represented all the 5 cm cories. Then the site had to change hosts in a hurry, the original forum was lost and cories vanished from the database.
Dwarf gouramis are very hit and miss. Most of the ones bred in the far east are already infected with dwarf gourami disease by the time they arrive at the shop. This is incurable, and commonly kills the gouramis within a few months. You may be lucky and have disease free fish, but if they do have it, don't get any more gouramis of any type for this tank.
Buying 1 male, 2 females was a good idea. For their size, dwarf gouramis are aggressive fish, and males have been known to kill females if he was "in the mood" and she wasn't. With two females to spread any aggression, they shouldn't come to harm.
You have listed 4 cherry barbs, 3 albino cories and 3 dwarf gouramis. Are there any other fish besides these?
I would get more cories to a total of at least 6, and more cherry barbs, again to at least 6. Six is the minimum for shoaling fish but more is always better. There would still be room for another species of shoaling fish.