Perhaps you should try some spelling variations:
sang tao » hang tai
cham duc » pham duc, cham soc, pham duy
ban hanh » ban hang
tu cach » tu cac
co sach » bo sach, cuon sach, hoc sach
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
duc ban » duc tan, duc van, dua ban
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 cach) or (co sach)) ky sang tao hoi. hieu ve cham duc ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (co sach)) ky sang tao hoi. hieu ve cham duc ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (co sach)) ky sang tao hoi. hieu ve cham duc ban hanh vi cua tre*.