Perhaps you should try some spelling variations:
thieu nghe » thieu nhi, lieu nghe, nhiem nghe
tham toc » thac toc, tham nuoc, tham thuc
nghe cua » nghiep cua, nghe va, nghe che
nhung bo » nhung bi, nhung bai, nhung don
vu sach » su sach, vu khach
bo o » bo ho, bo oc, bo so
o vi » co vi, so vi, o va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu bach)) tham toc thieu nghe cua ets : nhung bo o vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) tham toc thieu nghe cua ets : nhung bo o vi đai.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu bach)) tham toc thieu nghe cua ets : nhung bo o vi đai*.