Perhaps you should try some spelling variations:
sang tao » hang tai
cham tuc » nham thuc, pham thuc, tham thuc
van doan » van doanh, van toan, van hoan
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va doan » va doanh, va dan, va don
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 tao hoi. hieu ve cham tuc ((va doan) or (van doan)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang tao hoi. hieu ve cham tuc ((va doan) OR (van doan)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang tao hoi. hieu ve cham tuc ((va doan) or (van doan)) vi cua tre*.