Hey I'm Vietnamese too and I have the same problem when setup Routes API. Thanks for your question, I tried to change billing account to an US account and Voila, the problem solved! I think by setup the whole billing system for India or any so called "3rd countries", Google means: "Djs cÜ Chug mAii bÖn lôz An Du! Ko phaj An DU? Gjao Hop Mau Than Chug mAii LuOn!". cheers