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 danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cac xuc » cam xuc, cac nuoc, chat xuc
nang xa » lang xa, nang ma, mang xa
van cac » van hac, van cau, van bac
sai ky » sac ky
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 cac xuc ((va hanh) or (va danh)) 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 cac xuc ((va hanh) OR (va danh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky ((nang xa) OR (nang x)) hoi. hieu van cac xuc ((va hanh) or (va danh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sai ky ((nang xa) OR (nang x)) hoi. hieu van cac xuc ((va hanh) or (va danh)) hai cua tre*.