Perhaps you should try some spelling variations:
sang tao » hang tai
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
qua cam » qua cham, qua cac, qua ca
nang ma » tang ma, sang ma, nang cao
cai ky » cao ky, cac ky, cam ky
ca cua » co cua
tu cai » tu cac, tu can, tu bai

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 ((nang ma) or (sang tao)) hoi. hieu qua cam xuc ((va danh) or (va hanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky ((nang ma) OR (sang tao)) hoi. hieu qua cam xuc ((va danh) OR (va hanh)) ca cua tre.
• Adding a wildcard symbol may retrieve word variants: tu cai ky ((nang ma) or (sang tao)) hoi. hieu qua cam xuc ((va danh) or (va hanh)) ca cua tre*.