Perhaps you should try some spelling variations:
ky doanh » ly doanh, ky danh, ty doanh
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
ca viet » va viet, co viet, hoa viet
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, dua ban
ve cham » va cham, ve chat, vu cham
tai boi » tao boi, tai bon, tai bui
sai ky » sac ky
ve cam » ve cac, va cam, ve cai
tu sai » tu bai, tu san, tu 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 doanh tai boi. hieu ((ve cam) or (ve cham)) duc ban hanh hai ((cua tre) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky doanh tai boi. hieu ((ve cam) OR (ve cham)) duc ban hanh hai ((cua tre) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: tu sai ky doanh tai boi. hieu ((ve cam) or (ve cham)) duc ban hanh hai ((cua tre) or (ca viet))*.