Perhaps you should try some spelling variations:
thieu nien » thien nhien
hieu vien » hieu hien, hieu viec, hieu tieng
bach nuoc » bach tuoc, sach nuoc, bich ngoc
so sach » so sanh, bo sach, co sach
ty hang » ly hang, ty xang, thi hang
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 hang) or (ky nang)) xa hoi. ((hieu vien) OR (thieu nien)) bach nuoc va danh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty hang) OR (ky nang)) xa hoi. ((hieu vien) OR (thieu nien)) bach nuoc va danh vi cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ty hang) or (ky nang)) xa hoi. ((hieu vien) OR (thieu nien)) bach nuoc va danh vi cua tu*".