Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
hanh vai » hanh vi, hanh tai, hanh van
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
hanh va » hang va, hanh vi
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
tu sai » tu bai, tu san, tu cai
xuc va » duc va, tuc va, luc va
sai ky » sac 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: tu sai ky tang ((mai khoi) or (lai hoi)). hieu ve cac xuc va ((hanh vai) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky tang ((mai khoi) OR (lai hoi)). hieu ve cac xuc va ((hanh vai) OR (hanh va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky tang ((mai khoi) or (lai hoi)). hieu ve cac xuc va ((hanh vai) or (hanh va)) cuu tre*.