Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
cua tre » cua te, cuu tre, cua triet
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
lam xuc » cam xuc, lam duoc
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
te sai » te bai, 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 tai)) ky tang xa hoi. ((hieu van) OR (thien van)) lam xuc va dinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te tai)) ky tang xa hoi. ((hieu van) OR (thien van)) lam xuc va dinh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sai) or (te tai)) ky tang xa hoi. ((hieu van) OR (thien van)) lam xuc va dinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sai) or (te tai)) ky tang xa hoi. ((hieu van) OR (thien van)) lam xuc va dinh vi cua tre*.