Tā xúnzhǎo néng ràng rén cháng shēng bù lǎo de língyào.
He searched for a potion that could make people immortal.
Tips
culture
灵药 appears frequently in Chinese mythology and wuxia fiction as a magical elixir granting immortality or extraordinary powers. It often features in stories about Taoists seeking longevity.
memory
灵 (líng) means 'spirit/miraculous' and 药 (yào) means 'medicine'. A 灵药 is medicine so potent it seems magical.