Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
ket cua » ket qua, det cua, keo cua
va kinh » va tinh, qua kinh
va dinh » van dinh, va tinh, vu dinh
nam xuc » cam xuc, nam xua, nam thuc
nang xa » nang x, lang xa, nang ma
te bai » te bao, te tai, te ban
te sai » te tai, te lai, te hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sai) or (te bai)) ky nang xa hoi. hieu van nam xuc ((va dinh) OR (va kinh)) ket cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te bai)) ky nang xa hoi. hieu van nam xuc ((va dinh) OR (va kinh)) ket cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sai) or (te bai)) ky nang xa hoi. hieu van nam xuc ((va dinh) OR (va kinh)) ket cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sai) or (te bai)) ky nang xa hoi. hieu van nam xuc ((va dinh) OR (va kinh)) ket cua tre*.