Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu nghe » lieu nghe, hiem ngheo, nhiem nghe
nghe nam » nghe lam, nghiep nam, nghe nano
te sach » toc sach
thu nam » tu nam, thu nhap, thu nhat
nam dan » nam dinh
dan sai » danh sai, doan sai, dan tai
cua tre » cua te, cuu tre, dua tren
y nang » ly nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) or (ky nang)) ma hoi. hieu nghe nam thu nam dan sai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ky nang)) ma hoi. hieu nghe nam thu nam dan sai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (ky nang)) ma hoi. hieu nghe nam thu nam dan sai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ky nang)) ma hoi. hieu nghe nam thu nam dan sai ((cua tre) OR (cua triet))*.