Perhaps you should try some spelling variations:
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
va danh » va dinh, va dan, va hanh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
va chat » van chat, va phat, hoa chat
di cua » dai cua, doi cua, de cua
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cai ky dang xa hoi. hieu ((va chat) OR (cao chat)) cua ((ban hanh) or (va danh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky dang xa hoi. hieu ((va chat) OR (cao chat)) cua ((ban hanh) OR (va danh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ky dang xa hoi. hieu ((va chat) OR (cao chat)) cua ((ban hanh) or (va danh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cai ky dang xa hoi. hieu ((va chat) OR (cao chat)) cua ((ban hanh) or (va danh)) di cua tre*.