Perhaps you should try some spelling variations:
hien bich » phien dich, chien dich, mien dich
bich ngoc » bich nga, dinh ngoc
bieu hien » dieu hien, dieu khien, bien phien
vai cua » dai cua, hai cua, lai cua
ha danh » han danh, hoa danh, ha anh
ngoc ha » ngoc hai, ngoc hoa
so sach » so sanh, bo sach, co sach
ty nang » ky nang, ty hang, ly nang
vi cua » di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ty nang) or (ty xang)) xa hoi. bieu hien bich ngoc ha danh ((vi cua) OR (vai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty nang) OR (ty xang)) xa hoi. bieu hien bich ngoc ha danh ((vi cua) OR (vai cua)) tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ty nang) or (ty xang)) xa hoi. bieu hien bich ngoc ha danh ((vi cua) OR (vai cua)) tu*".