Thư viện prompt AI miễn phí cho người Việt

Horizontal 16:9 presentation slide background. In the lower third, an authentic Vietnamese high school teacher wearing a neat pastel blue ao dai sits at a light natural wood teacher's desk in a modern Vietnamese classroom. On the desk are neatly stacked unbranded notebook paper, an unbranded red grading pen, and a blank ceramic mug. Soft daylight streams through large windows, creating a gentle, heavily blurred office-style background of chalkboards and shelves. The upper two-thirds of the frame consists of clean, airy, negative empty space in soft off-white and warm cream tones, completely free of any text, letters, symbols, or logos, leaving ample room for slide titles.