Perhaps you should try some spelling variations:
ban hanh » ban hang
danh tao » doanh tai, danh giao, dao tao
hanh hai » thanh hai, nhanh hai, hang hai
co viet » so viet, o viet, hoc viet
ky danh » ky anh, ky dang
tao hoi » tao khoi, tao boi, tay hoi
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
duc ban » duc tan, duc van, dua ban
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ve cam » ve cac, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky danh tao hoi. hieu ((ve cam) or (ve cham)) duc ban hanh hai ((cua tre) or (co viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky danh tao hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh hai ((cua tre) OR (co viet)).
• Adding a wildcard symbol may retrieve word variants: tu sai ky danh tao hoi. hieu ((ve cam) or (ve cham)) duc ban hanh hai ((cua tre) or (co viet))*.