A hand holding open a book showing a table of contents, listing chapters and sections with their corresponding page numbers. Two pens are placed on the wooden surface beside the book.
A close-up view of a practical guide book with a blue and yellow cover, along with a prescription lens set and an optical device placed on a flat surface.
A hand holding open a book showing a table of contents, listing chapters and sections with their corresponding page numbers. Two pens are placed on the wooden surface beside the book.
Three individuals are in a classroom setting, with two standing and holding a banner while another sits on a ledge. The banner is written in Vietnamese with text related to a thesis defense event at a university. The room contains several wooden chairs and a blackboard can be seen behind them.
A hand holding open a book showing a table of contents, listing chapters and sections with their corresponding page numbers. Two pens are placed on the wooden surface beside the book.