Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
duc van » duc va, duc manh, duc phan
cua tre » cua te, cuu tre, cua triet
su hai » su tai
hai ky » thai ky, hoi ky, hai ly
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su hai ky tang xa hoi. hieu va cam ((duc van) or (duc tan)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su hai ky tang xa hoi. hieu va cam ((duc van) OR (duc tan)) hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su hai ky tang xa hoi. hieu va cam ((duc van) or (duc tan)) hanh thai cua tre*.