Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
luoc dai » cuoc doi, hoc dai, duc dai
hanh lai » hanh lam, hanh tai, thanh lap
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

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 mai hoi. hieu ve cac ((duc van) or (luoc dai)) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang mai hoi. hieu ve cac ((duc van) OR (luoc dai)) hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang mai hoi. hieu ve cac ((duc van) or (luoc dai)) hanh lai cua tre*.