Q&A: Kindly change the wording of the following semtences to make them sense to you?

Question by LOL: Kindly change the wording of the following semtences to make them sense to you?
my key challenges :
- Low OH&S awareness standard of Chinese contractors
- The number of contractors is high that makes a toughie for OH&S management (OHS stands for health occupational and safety)
- Multi- culture of the company cause a problem for communication
- Vehicles for Customers, contractors are tough to control.


Best answer:
Answer by exotherm1- Low OH&S awareness standard of

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