@choya
sorry for the delay of response, I really couldnt get a good look at the specimen but it can only be either of these two species......The locality and size would suggest that it is a puddle frog (Occidozyga laevis) but the patterns and tubercles would rather suggest the Asian brackish water frog (Rana cancrivora). If you have more pics or if you still have the specimen, try to check if it has a V-design right between the eyes....if it has then it is a R. cancrivora if none then it just might be O. laevis. check the net for more reference and info.