Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam danh » nam dinh, nam dan
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
xa danh » va danh, dia danh, van danh
ve nam » he nam, va nam, le nam
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: tu sach ky sang ma hoi. hieu ve nam thu ((xa danh) or (nam danh)) sai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ma hoi. hieu ve nam thu ((xa danh) OR (nam danh)) sai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ma hoi. hieu ve nam thu ((xa danh) or (nam danh)) sai ((cua tre) or (cua triet))*.