Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
hieu van » thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
dai hoi » dai hoc, dai hai, dai moi
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
xa hanh » xa thanh, xa khanh, va hanh
cua tre » cua te, cuu tre, cua triet
so sac » so sach, so dac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky nang dai hoi. ((((hieu ve) or (hieu va))) or (hieu van)) cam tuc xa hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang dai hoi. ((((hieu ve) OR (hieu va))) OR (hieu van)) cam tuc xa hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sac ky nang dai hoi. ((((hieu ve) or (hieu va))) or (hieu van)) cam tuc xa hanh dai cua tre*.