Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
cam tu » cam thu, nam tu, dam tu
cua te » cua tu

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