"I do not believe in the fortune-teller."

Translation: Tôi không tin vào thầy bói.

[AnCatDubh]

Shouldn’t there be a người there?

[hippietrail]

Surely it ought to be "I don't believe the fortune-teller". To not believe in something means you believe it doesn't exist. Fortune-tellers exist whether or not they can actually tell anyone's fortunes.