Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
hanh dai » hanh tai, hanh dao, vanh dai
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
te sai » te tai, te bai, te hai
te lai » te tai, te bai
ma hoi » mai hoi, xa hoi, ma hoa
nam tu » nam thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sai) or (te lai)) ky nang ma hoi. hieu van ((nam thuc) or (nam tu)) va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te lai)) ky nang ma hoi. hieu van ((nam thuc) OR (nam tu)) va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sai) or (te lai)) ky nang ma hoi. hieu van ((nam thuc) or (nam tu)) va hanh dai cua tre*.