I want know truth.

我想知道真实。

youdao

I want to know the truth about this matter.

我要知道这件事的真情。

《新英汉大辞典》

I didn't know how to start. I didn't want to accuse him of anything. I just wanted to know the truth. "Are you okay?" I finally asked.

我不知道如何开口。也不想指责他任何事。我只想知道真相。“你还好吗？”最后我这样问。

youdao

When you ask for the investment rate, you want to know the truth-- how much am I really getting so they don't monkey around here.

当你问投资收益率时,你要知道,我到底能赚多少,所以他们不再偷懒

耶鲁公开课 - 金融市场课程节选

"I want to know the truth, " Lee said.

CNN: Palin daughter's pregnancy stirs strong emotions from iReporters

And I still want to know the truth about this luminous figure, Jesus of Nazareth.

CNN: Seeking the truth about Jesus

"I really didn't want to know the truth or anything about my real family, " she recalls.

BBC: World