Perhaps you should try some spelling variations:
dau nuoc » dat nuoc, dau ngoc, cap nuoc
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi
va dau » va dao

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 (tu cac)) ky nang ((ma hoi) or (mai hoi)). hieu va dau nuoc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (tu cac)) ky nang ((ma hoi) OR (mai hoi)). hieu va dau nuoc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (tu cac)) ky nang ((ma hoi) or (mai hoi)). hieu va dau nuoc va hanh vai cua tre*.