Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
nang dai » nang dau, nang tai, lang dai
cua tre » cua te, cuu tre, cua triet
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
tuc va » thuc va, truc va, tuc xa
luc va » duc va, loc va
su mai » su tai, su dai, tu mai
su hai » su tai
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: ((su mai) or (su hai)) ky nang dai hoi. hieu ve cac ((luc va) or (tuc va)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su mai) OR (su hai)) ky nang dai hoi. hieu ve cac ((luc va) OR (tuc va)) hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su mai) or (su hai)) ky nang dai hoi. hieu ve cac ((luc va) or (tuc va)) hanh dai cua tre*.