"How do you translate this sentence into Vietnamese?" she asked.
→ She asked me how I translated that sentence into Vietnamese.

"When will your father leave Vietnam for the USA?" Phong asked Thu.
→ Phong asked Thu when her father would leave Vietnam for the USA.

"How many people did you invite to your party?" he asked.
→ He asked how many people I had invited to my party.

"Where does your father work?" The teacher asked me.
→ The teacher asked me where my father worked.

"How long have you learnt English, Trang?" the teacher asked.
→ The teacher asked Trang how long she had learnt English.

Mr. Green said: "Please come to our dinner tonight, Bill."
→ Mr. Green told Bill to come to their dinner that night.

Susan said to Tom: "Don't call me again at this late hour."
→ Susan told Tom not to call her again at that late hour.

"Open the door," he said to them.
→ He asked them to open the door.

"Where are you going?" he asked her.
→ He asked her where she was going.

"Which way did they go?" he asked.
→ He asked which way they had gone.

"Bring it back if it doesn't fit," I said to her.
→ I told her to bring it back if it didn't fit.