Perhaps you should try some spelling variations:
thien van » thi van
su sach » so sach, vu sach
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thi hang
y hang » ly hang, yu hang, _ hang
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y hang) OR (ty hang)) xa hoi. ((hieu va) or (thien van)) cam xuc va dinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y hang) OR (ty hang)) xa hoi. ((hieu va) OR (thien van)) cam xuc va dinh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y hang) OR (ty hang)) xa hoi. ((hieu va) or (thien van)) cam xuc va dinh vi cua tre*".