管用 | guǎn yòng | efficacious / useful | |
灵验 | líng yàn | efficacious / effective / (of a prediction) accurate / correct | |
灵 | líng | quick / alert / efficacious / effective / to come true / spirit / departed soul / coffin | |
特效 | tè xiào | special effect / specially good effect / especially efficacious |