Perhaps you should try some spelling variations:
thieu nien » thien nhien
va trien » va truyen, va thiet, va tuyen
nien cac » vien cac, dien cac, bien cac
va triet » va thiet, ve triet, cua triet
danh hai » dang hai, lanh hai, manh hai
va danh » va dinh, va dan, va hanh
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
cac bao » cach bao, cac bai, cac ban
bao va » bao ve, tao va, ban va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. thieu nien cac bao va danh hai ((va triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang xa hoi. thieu nien cac bao va danh hai ((va triet) OR (va trien))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. thieu nien cac bao va danh hai ((va triet) OR (va trien))*.