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
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
sai ky » sac ky
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 ((nang ma) OR (tang ma)) hoi. hieu va cac xuc ((va danh) or (va hanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang ma) OR (tang ma)) hoi. hieu va cac xuc ((va danh) OR (va hanh)) ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang ma) OR (tang ma)) hoi. hieu va cac xuc ((va danh) or (va hanh)) ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang ma) OR (tang ma)) hoi. hieu va cac xuc ((va danh) or (va hanh)) ca cua tre*.