Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
xa hanh » xa thanh, xa khanh, va hanh
cam tuc » cam xuc, cam tu, dam thuc
hieu ve » hieu va
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang x ho. ((hieu ve) or (hieu van)) ((cam tuc) OR (nam thuc)) xa hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang x ho. ((hieu ve) OR (hieu van)) ((cam tuc) OR (nam thuc)) xa hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang x ho. ((hieu ve) or (hieu van)) ((cam tuc) OR (nam thuc)) xa hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x ho. ((hieu ve) or (hieu van)) ((cam tuc) OR (nam thuc)) xa hanh vai cua tre*.