Tāmen bùdǒnɡ rúhé jīnɡyínɡ ɡōnɡsī. 

他们不懂如何经营公司。

They don't know how to run a business.

Notes:

他们(tāmen): they

不懂(bùdǒnɡ):don't understand

如何(rúhé): how to

经营(jīnɡyínɡ): to run(a business)

公司(ɡōnɡsī):company

Example:

A:他们不懂如何经营公司。

     Tāmen bùdǒnɡ rúhé jīnɡyínɡ ɡōnɡsī. 

     They don't know how to run a business.

B:你说得对。

     Nǐ shuō de duì. 

     You're right.

Level: