有什么心结我给你调节 "When you have troubles, I'll help problem solving" 调节 is more like adjust or regulate for temperature. 有什么心结我给你调解 will be more equivalent to " I'll help with problem shooting when you have troubles." 调解 ＝to clear or solve the problem for example : 调解问题=to solve the problem. 调解心情=to clear the (gloomy) mood. If you have more questions, I am glad to help. Thanks

I suppose in English, it means to help a person face problems in his interior landscape, to change his mentality and approach to life, so as to achieve well-being and mental health, and thereby to live more happily.

Regulation

改变心态，适应环境，从而活得更愉快。这就是调节。