Can I use Venomoth GX's "Ten-Card Return GX" attack if I have no cards in my hand?
Yes, but you must shuffle your deck before drawing cards.
Source: Unbroken Bonds FAQ (2019-04-19), TPCi Rules Team (2019-05-02)

Relevant cards

Note: All applicable cards may not be listed below.
SM10_12
SM10_12
SM10_193
SM10_193
SM10_216
SM10_216