to be valid, effective, take effect, come into effect, be in force ☊ 
có hiệu lực 
effective like: có hiệu lực → →
Wirkung zeigen ☊ 
có hiệu lực, có kết quả ☊ 
起作用 ☊ qǐ zuò yòng wirkungsvoll ☊ có kết quả, có hiệu lực ☊ 有效的 ☊ yǒu xiào de Wirkung zeigen ☊ có hiệu lực, có kết quả ☊ ☊ wirkungsvoll ☊ có kết quả, có hiệu lực ☊ ☊ I tried to persuade him, but with little or no effect. ☊ effect ☊
He only behaves like that for effect (= in order to impress people). ☊ effect ☊
New controls come into effect next month. ☊ come into effect ☊
The new regulations are now in force. ☊ in force ☊
When do the new regulations come into force? ☊ come/enter into force ☊
The offence carries a maximum prison sentence of ten years. ☊ maximum ☊
This special offer is valid until the end of the month. ☊ offer ☊
The present regime has been in power for two years. ☊ power ☊