Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
than duc » tran duc, phan duc, than doc
cua tre » cua te, cuu tre, cua triet
lai cua » dai cua, hai cua, lai chau
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va
duc van » duc va, duc tan, duc manh
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ma hoi » xa hoi, ma hoa, me hoi

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 sai ky nang ((ma hoi) OR (mai hoi)). ((hieu va) OR (hieu qua)) than duc van hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((ma hoi) or (mai hoi)). ((hieu va) OR (hieu qua)) than duc van hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((ma hoi) or (mai hoi)). ((hieu va) OR (hieu qua)) than duc van hanh lai cua tre*.