2 sentences

1. 我知道这背后另有隐情。

   wǒ zhī​dào zhèi bèi​hòu lìng yǒu yǐn​qíng.

   I know something else is behind this.

   Source: OpenSubtitles

2. 既然他不愿多说，我们也就不要打听他的隐情了。

   jì​rán tā bù yuàn duō shuō, wǒ​men yě jiù bù yào dǎ​ting tā de yǐn​qíng le.

   Since he is unwilling to say more, let's not pry into his secrets.

   Source: Dong Chinese Dictionary