For the Thai Bible, you may ask 聖經公會in TST:
2368-5147
They have Bibles in different languages.
I know the ICA (International Christian Assembly國際神召會) in Norh Point has a Thai worship congregation (led by a Thai pastor).
Service Time: Sundays 2:30pm
1st Floor, 44-50 Tanner Road, North Point
Tel: 2529-4008
Pastor Wiphawan Thirasetmanakul
Website: http://www.icahk.org
They also have Filipino / Sri Lankan / Indonesian Worship Congregation
Even if North Point seems very far away from your home, you may still give the above information to your helper and ask her to contact the pastor for more advice. I think your helper will be more than happy to talk with someone from her own country (I mean the pastor).
(My previous Indonesian helpers--two of them--were very happy to know and to talk with the Indonesian pastor)