It's an expression used to indicate that there is no need to worry or be concerned.
चिंता मत करो
English Usage: "Not to worry, everything will be fine."
Hindi Usage: "चिंता मत करो, सब ठीक हो जाएगा।"
Transliteration of चिंता मत करो
chinta mat karo, chintaa mat karo, chinta nahi karo, chinta mat kar, chintaa mat kar, chinta mat karo na, chinta naa karo, chinta mat kijiye, chinta mat karo ji
