Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, te sach, tu cach
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
hang xa » hoang xa, hang va, hang ca
su sach » so sach, vu sach
y hang » ly hang, ty hang, yu 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y 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: "((tu sach) OR (su sach)) y hang xa hoi. ((hieu va) or (thien van)) cam xuc va dinh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) y hang xa hoi. ((hieu va) or (thien van)) cam xuc va dinh vi cua tre*.