Perhaps you should try some spelling variations:
nano thue » nang thuc, dan thue, nam thue
hieu nghe » lieu nghe, hiem ngheo, nhiem nghe
nghe nano » nghe dan, nghe san, nghe nhan
danh sai » dung sai, danh bat, danh dau
sai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
thue va » thuc va, thuyet va, thuc vat
tu sach » thu sach, su sach, tu cach
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
y nang » ky nang, ly nang, v nang

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) OR (te sach)) y nang ((ma hoi) or (ma hoa)). hieu nghe nano thue va danh sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang ((ma hoi) OR (ma hoa)). hieu nghe nano thue va danh sai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) y nang ((ma hoi) or (ma hoa)). hieu nghe nano thue va danh sai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) y nang ((ma hoi) or (ma hoa)). hieu nghe nano thue va danh sai cua tre*.