Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
tu sac » tu sach, tu cac, tu bac
ro lai » o lai, ru lai
tu san » thu san, tu ban, tu can
ho lai » o lai

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang ((ro lai) OR (ho lai)). hieu ve cac duc van hanh thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu san)) ky nang ((ro lai) OR (ho lai)). hieu ve cac duc van hanh thai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu san)) ky nang ((ro lai) OR (ho lai)). hieu ve cac duc van hanh thai cua tre*.