Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
van cam » van nam, van lam, van cau
nang xa » lang xa, nang ma, mang xa
sai ky » sac ky
va dan » ca dan, va dao, va dau
su sai » su tai, su hai, su dai

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

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