Is it possible to make a query to specific node in an knowledge AI

Instead of judging the whole knowledge AI, I want the bot to make a judgement(query) a specific child node in a knowledge AI.
Is it possible logically if yes which variables or script I should use ?

I want to increase the quality of answers so I want to just directly search a specific node in certain cases.

Please do let me know if we have any samples etc .

Thanks