Cannot type/read Thai in iTerm2

Follow this steps in iTerm2

• Preferences
• Profiles
• Terminal
• Unset “Set local variables automatically”

and set locale, lang in bash_profile

~/.bash_profile
export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8

References:

LANG variable wrong in iTerm2, where's the bug?

In OS X Lion, LANG is not set to UTF-8, how to fix it?