Perhaps you should try some spelling variations:
nghe nano » nghe dan, nghe san, nghe nhan
hieu nghe » lieu nghe, hiem ngheo, nhiem nghe
danh sai » dung sai, danh bat, danh dau
tu sach » thu sach, su sach, te sach
sai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
nano tu » nang tu, nao tu, nano cau
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty hang, ly nang
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 sach ((ty nang) OR (ty xang)) ((ma hoi) or (ma hoa)). hieu nghe nano tu va danh sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) ((ma hoi) OR (ma hoa)). hieu nghe nano tu va danh sai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty xang)) ((ma hoi) or (ma hoa)). hieu nghe nano tu va danh sai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty xang)) ((ma hoi) or (ma hoa)). hieu nghe nano tu va danh sai cua tre*.