Perhaps you should try some spelling variations:
thieu nien » thien nhien
cua triet » cua viet, su triet, va triet
nien cac » vien cac, dien cac, bien cac
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
cac tao » cau tao, cac tro, cac tac
va dan » ca dan, va dao, va dau
dan va » doan va, dan ca, ban va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sach) OR (su sach))) or (vu bach)) ky nang xa hoi. thieu nien cac tao va dan va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (su sach))) OR (vu bach)) ky nang xa hoi. thieu nien cac tao va dan va cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (su sach))) or (vu bach)) ky nang xa hoi. thieu nien cac tao va dan va cua triet".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (su sach))) or (vu bach)) ky nang xa hoi. thieu nien cac tao va dan va cua triet*.