QnA Chatbot not recognizing some questions.

I was making a chatbot for a Japanese company and was using the QnAbot to create it. I imported all the questions and answers on the QnAbot Designer.

After trying to test the chatbot using QnAbot Client, I found that even though the question exists on the Designer, it does not seem to give me a response. Some words seem to work, while the majority do not, without any sort of pattern. I am not certain what is causing the issue. For example,

These works:

アクセス権限マトリクス一覧表

申請方法（スマホ内線）

These do not work:

早期退職

通達（スマホ内線）

They are similar yet one works, while the other does not. In total, there are around 500 questions and answers. Is it the Japanese characters? I am not certain.