错了，应该这么说：What help do you need?
可以说成you need what help?强调help,what help you need,更带有感情色彩,强调you
有点中国英语了吧建议：What can i do for you ? Can i help you ? 根据语境选择。
What kind of help do you need?
应该说Can I help you ？
