If you are working on building a deck, it'll only show cards that are viable for the deck (unless you go to the filter window and select show all). If you happen to pick a faction symbol for a faction not viable for your deck, then it won't show any cards. To show all cards that are viable, all factions need to be deselected.
Currently, there's no way to view cards you don't own in the game. There is plans for a 'binder' that'll show your collection of cards as well as cards you don't yet own. In the meantime, you can view all cards at infinite-network.com. A few of the cards may not be up to date with some of the more recent changes, but their effects should be, for the most part, similar. They even updated with the new set of Order. It's also a great site for looking up other people's decks to get an idea of the various strategies that are available, and to see what you can strive for.