I think 'Take Care' has lots of meaning. When you say it good-bye situation, you can say '살펴가세요' or '몸조심히 가세요.' formal and '조심히 가' informal. But when you say to someone to give a caution, you can say '주의하세요' or '몸조리 잘하세요' formal and '조심해' informal. If you have more question, please let me know. Thanks.

formal: 몸 건강하세요 informal: 몸 건강해

돌보다: look after, take care of, اعْتَنَى بـ ------------조심하다 be carefull , احْتَرَسَ من ------for examples search here : endic.naver.com -- and -- dic.daum.net/search.do?&dic=eng