With the exception of H-L, most of these aren't covered by most teachers because they're not really necessary. If your class does use them, though, this video will explain what they are and how they're derived from SAS, ASA, and AAS.
HL, HA, LL, LA Proof Examples
Full proofs using these most special of right-angle theorems. Don't watch these if your class doesn't cover them, though, because you won't be allowed to use them on tests.
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)