How to construct a search string?

(Hydrogen OR (Hydrogen oxygen) OR H OR HO OR H-O OR (hydrogen gas) OR (proton exchange membrane) OR H2 OR (H oxygen)) AND (Fuel) AND (Cell OR battery OR (electronic cell)) AND (Vehicle OR Automobile OR Boat OR Car OR Van OR Truck OR Plane OR (storage tanks) OR generator OR system) AND (fire OR flame OR explosion OR gas OR blaze OR heat OR smoke OR Sparks OR burst OR blast OR inflammable OR confinement OR oxygen concentration OR burnable OR combustion) AND (prevention OR proof* OR protection OR retardant OR extinguishing OR Retarding OR Resistance OR stop OR arrester)