. Evaluative Feedback FTA Face- threatening Act FSA Face- saving Act FSS Face- saving Strategy H The hearer HaF Hit-all Feedback HoF Hit-one Feedback HAdv Highly Adv i sable InAdv Inadvisable. the findings drawn out from the analysis of data. The findings and discussion are based on describing and contrasting face- saving strategies used by American and Vietnamese teachers. Chapter. The aims of the study are: 2  To investigate the face- saving strategies used by American and Vietnamese teachers when giving oral feedback to students in English classrooms.