How to enter in TWRP/recover on Huawei P9 lite with keys?

I have a p9 lite Huawei. I can boot into twrp with this command

adb reboot recovery

But without adb, I cannot enter in recovery mode. If I push Volume Down+Power, it goes into bootloader (I can see a green droid logo). If I push Volume Up+Power, it opens the EMUI recovery. How to get recovery mode with twrp?Is possible with fastboot? I have installed the twrp with

fastboot flash recovery twrp.img

Answer

I have found a workaround to enter in recovery.

a)Turn off device
b)Push power+VolumeDown
c)We enter in bootloader mode, with volumeup key we select the "recovery" and press power
d)Device reboot to twrp