I found how to cheat Master League - Focused Training. It's very easy, but 1 simple mistake would fuck the player Focus training.
Although, just save before hacking the training point. Loading it would reset back to the save state. Also it's very tedious process.
So be patient and not try to be smart, unless you're knowing what you're gonna do and the risk.
Step 1. Empty the training, fill (only) the SHOOTING training with 1 bar/pts.
Step 2. Search 1 with 4 bytes (thousand of result).
Step 3. Do not back and forth between the game and cheat engine (eg. Alt+Tab), instead just use your gamepad to fill the training stat to 3.
Step 4. Then search 3 in CE. Another result but lesser number this time.
Step 5. Now, like Step 3 ... but this time reduce SHOOTING training to 2, which just reduce 1 bar/pts. Do not forget, no Alt+Tab, use gamepad.
Step 6. In this time, you will likely found 4 results. Now, grab the result which start with 7FFDD######.
(After this, ALT+TAB is allowed as you've got the address)
Step 7. After you find that address, use all training points to fill anything but the SHOOTING training, leave it 0.
Step 8. After you've done that, back to CE fill that "7FFDD######" with 5.
Step 9. Back to PES, the SHOOTING training are empty, but just fill it till full, then reduce it to 0 and applied to other but the SHOOTING training.
Note : When you're on hacking process, the number would get randomize but the last number always 0 (zero). Just add that random number with 5 and repeat Step 9.
Step 10. Repeat the process until only SHOOTING training the last one need to be hacked and just simply repeat the process.
Step 11. Now after all Training bar filled, this last step are very very very very very important as if you're make a mistake, you are fucked.
Step 12. You must Select OK and confirm (Button X) with you gamepad. In Playstation Gamepad, X for confirm, Circle for back/undo/cancel. If you press Circle, you are fucked.
Note : Always remember, after you've done this, you must never lower your guard and forget not to press Circle when meddling with Focused Training, because if you forget to select OK & confirm it with X Button, and press Circle ... again, you are fucking fucked fuck up and don't ask me how to fix it.