Perhaps you should try some spelling variations:
nghe nam » nghe lam, nghiep nam, nghe nano
nam danh » nam dinh, nam dan
danh dai » danh dau, danh di, danh sai
tu sach » thu sach, su sach, te sach
thu nam » tu nam, thu nhap, thu nhat
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
he nam » ha nam

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 y nang ((ma hoi) or (ma hoa)). hieu ((he nam) or (nghe nam)) thu nam danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((ma hoi) OR (ma hoa)). hieu ((he nam) OR (nghe nam)) thu nam danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((ma hoi) or (ma hoa)). hieu ((he nam) or (nghe nam)) thu nam danh dai cua tre*.