Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky
x hoi » xa hoi, o hoi, x ho

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

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