[Imteaz]

Doosra and Wrong'uns are synonyms of Googly. Usually googly was one of the tricks for Leg Spinners. It means after delivery of the ball Batter usually think that it's a leg spin but it will turn opposite means off spin. When Saqlain Mushtaq invented same type of things, he named it doosra. It means after delivery of the ball Batter usually think that it's an off spin but it will turn opposite means leg spin. Now a day it is an available trick for all spinners. It just make a batter fool by guessing wrong. Same like reverse swing from quick bowlers.

I am not 100% sure about flipper and Arm ball. Waiting for clarification from someone.