Welcome to this forum, PhuongHeli. You are doing well to get servos moving.
This could be your motor problem. From your UAV:
<field values="0.01,0.71,0.85,0.94,1" name="ThrottleCurve1"/>
<field values="-1,0.41,0.7,0.88,1" name="ThrottleCurve2"/>
The first ThrottleCurve1 value should be zero like mine from a UAV:
<field name="ThrottleCurve1" values="0,0.25,0.5,0.75,1"/>
<field name="ThrottleCurve2" values="-1,-0.5,0,0.5,1"/>
<field name="MixerValueRoll" values="50"/>
<field name="MixerValuePitch" values="50"/>
<field name="MixerValueYaw" values="50"/>
<field name="RollDifferential" values="0"/>
<field name="FirstRollServo" values="0"/>
<field name="Curve2Source" values="Collective"/>
Fix your ThrottleCurve2, also.
Note: I didn't have throttle set low enough to arm on one of my helis. I used the TH switch to get the signal low enough to arm. If that is your problem then you can re-calibrate manually or change the throttle minimum in the GCS or your TX.
Use your TX to set your headspeed / throttle after you have LP set up.
Hope it helps.