Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cua tre » cua te, cuu tre, cua triet
va danh » va dinh, va dan, dia danh
nang xa » nang x, lang xa, nang ma
cac xuc » cam xuc, chat xuc, cac cuoc
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, ban hanh
su sai » su tai, su hai, su dai
sai ky » sac ky

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 hoi. hieu van ((cac xuc) OR (cac nuoc)) ((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 hoi. hieu van ((cac xuc) OR (cac nuoc)) ((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 hoi. hieu van ((cac xuc) OR (cac nuoc)) ((va hanh) or (va danh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sai ky nang xa hoi. hieu van ((cac xuc) OR (cac nuoc)) ((va hanh) or (va danh)) hai cua tre*.