Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu vien » hieu hien, hieu viec, thieu nien
hanh vai » hanh vi, hanh va, hanh tai
vien cac » vien bach, vien dai, vien da
tu cach » tu cac
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, va hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuat sach)) ky nang ((ha hoi) or (xa hoi)). hieu vien cac duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuat sach)) ky nang ((ha hoi) OR (xa hoi)). hieu vien cac duc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuat sach)) ky nang ((ha hoi) or (xa hoi)). hieu vien cac duc va hanh vai cua tre*.