Perhaps you should try some spelling variations:
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 cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
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 ma)) hoi. hieu qua cac xuc ((va danh) OR (va hanh)) ca cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ky ((nang ma) OR (sang ma)) hoi. hieu qua cac xuc ((va danh) OR (va hanh)) ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cai ky ((nang ma) OR (sang ma)) hoi. hieu qua cac xuc ((va danh) OR (va hanh)) ca cua tre*.