Perhaps you should try some spelling variations:
ban hanh » ban hang
cham duc » pham duc, cham soc, pham duy
cua tre » cua te, cuu tre, cua triet
va cham » va chat, va tham
ban anh » ban banh, ban danh, bang anh
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
ky sang » ky nang, ky tang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ((ky sang) or (ky dang)) ma hoi. hieu va cham duc ((ban anh) or (ban hanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky sang) OR (ky dang)) ma hoi. hieu va cham duc ((ban anh) OR (ban hanh)) dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky sang) or (ky dang)) ma hoi. hieu va cham duc ((ban anh) or (ban hanh)) dai cua tre*.