Perhaps you should try some spelling variations:
hieu nghe » lieu nghe, hiem ngheo, nhiem nghe
nghe nam » nghe lam, nghiep nam, nghe nano
dung sai » dung tai, dung va, dung dat
ha dung » hai dung, kha dung, nha dung
sai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sai ky)) nang ((ma hoi) or (ma hoa)). hieu nghe nam thu ha dung sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang ((ma hoi) OR (ma hoa)). hieu nghe nam thu ha dung sai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) nang ((ma hoi) or (ma hoa)). hieu nghe nam thu ha dung sai cua tre*.