Perhaps you should try some spelling variations:
cua chat » cua cha, chuan chat, cao chat
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
hieu cua » hieu qua, dieu cua, bieu cua
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
sai ky » sac ky
ma hoi » mai hoi, ma hoa, me hoi
ca cua » co cua
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 tang ((ma hoi) OR (xa hoi)). hieu cua chat xuc ((va danh) or (van hanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky tang ((ma hoi) OR (xa hoi)). hieu cua chat xuc ((va danh) OR (van hanh)) ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky tang ((ma hoi) OR (xa hoi)). hieu cua chat xuc ((va danh) or (van hanh)) ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky tang ((ma hoi) OR (xa hoi)). hieu cua chat xuc ((va danh) or (van hanh)) ca cua tre*.