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Từ điển Oxford Advanced Learner 8th 
	
		  mess around with something   
  ˌmess aˈround with sth derived   (BrE also ˌmess aˈbout with sth)  1. to touch or use sth in a careless and/or annoying way   •Who's been messing around with my computer?   2. to spend time playing with sth, repairing sth, etc.    Main entry: ↑messderived
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