Perhaps you should try some spelling variations:
vien dai » hien dai
hanh vai » hanh vi, hanh va, hanh tai
cao hoi » cau hoi, co hoi, cao hoc
duc van » duc va, duc tan, duc manh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang cao hoi. hieu ((vien dai) or (va cac)) ((duc van) or (luc canh)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang cao hoi. hieu ((vien dai) OR (va cac)) ((duc van) OR (luc canh)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang cao hoi. hieu ((vien dai) or (va cac)) ((duc van) or (luc canh)) hanh vai cua tre*.