Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
lang mai » lang dai, lang hai, lang man
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cac lop » cac loai
thu san » thuy san, thu ban, phu san
mai hoi » mai khoi, dai hoi, lai hoi
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
tu ban » thu ban, te ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu san) or (tu ban)) ky lang mai hoi. hieu va ((cac lop) or (cac hop)) va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu san) OR (tu ban)) ky lang mai hoi. hieu va ((cac lop) OR (cac hop)) va hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu san) or (tu ban)) ky lang mai hoi. hieu va ((cac lop) or (cac hop)) va hanh lai cua tre*.