Perhaps you should try some spelling variations:
mai hoi » mai khoi, lai hoi, mai doi
dai hoi » dai hoc, dai hai, dai moi
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ma hoi » xa hoi, ma hoa, me hoi
soc va » hoc va, loc va, doc va
vi cua » vai cua, di cua

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 nang ((ma hoi) or (((mai hoi) or (dai hoi)))). hieu va cham soc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang ((ma hoi) OR (((mai hoi) OR (dai hoi)))). hieu va cham soc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((ma hoi) or (((mai hoi) or (dai hoi)))). hieu va cham soc va hanh vi cua tre*.