Perhaps you should try some spelling variations:
tang tao » sang tao, tang tai, nang tao
cham duc » pham duc, cham soc, pham duy
tu cach » tu cac
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
tao hoi » tao khoi, tao boi, tay hoi
ky tang » ky nang, ky dang, kho tang
so sach » so sanh, bo sach, co sach
su sach » vu sach
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 (((su sach) OR (so sach)))) ky tang tao hoi. lieu va cham duc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (((su sach) OR (so sach)))) ky tang tao hoi. lieu va cham duc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (((su sach) OR (so sach)))) ky tang tao hoi. lieu va cham duc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (((su sach) OR (so sach)))) ky tang tao hoi. lieu va cham duc va hanh vi cua tre*.