Perhaps you should try some spelling variations:
thieu nien » thien nhien
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
nien cac » vien cac, dien cac, bien cac
tu sach » thu sach, su sach, te sach
cac cao » cac co, ca cao, bac cao
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
cao va » cao van, tao va, co 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 (so sach)) ky nang x ho. thieu nien cac cao va ((hanh vai) OR (hanh tai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (so sach)) ky nang x ho. thieu nien cac cao va ((hanh vai) OR (hanh tai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky nang x ho. thieu nien cac cao va ((hanh vai) OR (hanh tai)) cua tre*.