Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
dia danh » dia ban, gia dinh
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
xa danh » va danh, nam danh, van danh
hieu he » hieu ve, hiem he, hieu le
tang ma » mang may, tang van
y tang » ky tang, 6 tang, 7 tang
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 y tang ma hoa. hieu he nam thu ((xa danh) or (dia danh)) bat ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y tang ma hoa. hieu he nam thu ((xa danh) OR (dia danh)) bat ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach y tang ma hoa. hieu he nam thu ((xa danh) or (dia danh)) bat ((cua tre) or (cau tren))*.