Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
dia danh » dia ban, gia dinh
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
hieu he » hieu ve, hiem he, hieu le
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
xa danh » va danh, nam danh, van danh
he nam » ha nam, nghe 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 ky tang ma hoa. hieu he nam thu ((xa danh) or (dia danh)) bat ((cua tre) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoa. hieu he nam thu ((xa danh) OR (dia danh)) bat ((cua tre) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ma hoa. hieu he nam thu ((xa danh) or (dia danh)) bat ((cua tre) or (dau tren))*.