It literally translates to:
* Quiero: I want
* Volver: To return, to go back
The phrase can be used in various contexts, depending on the situation. For example:
* "Quiero volver a casa." (I want to go back home.)
* "Quiero volver a verte." (I want to see you again.)
* "Quiero volver a mi país." (I want to return to my country.)