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INTERMEDIATE LEVEL
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to accelerate, increase speed, go faster ☊ 
tăng tốc độ ☊
→ → →
like: tăng tốc độ → →
We aim to increase the speed of delivery (= how quickly goods are sent). ☊ speed ☊
Can you try and speed things up a bit? ☊ speed up, speed sth up ☊