Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
vi cua » vai cua, di cua

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

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