Perhaps you should try some spelling variations:
sach thien » sach thieu, sach tien, cach thien
thien ban » thien bang, phien ban, khien ban
thien van » thi van
cau treo » cau theo, cau tren, cau triet
dua tren » dung tren
cuu tre » cua tre, cau tren
so sach » so sanh, bo sach, co sach
va dinh » van dinh, va kinh, va tinh
van cam » van nam, van lam, van cau
dinh vi » dinh ve, dinh viet, dinh tri
xuc va » duc va, tuc va, luc va
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thien ban va hoi. thien van cam xuc va dinh vi ((dua tren) or (((cuu tre) or (cau treo))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thien ban va hoi. thien van cam xuc va dinh vi ((dua tren) OR (((cuu tre) OR (cau treo)))).
• Adding a wildcard symbol may retrieve word variants: so sach thien ban va hoi. thien van cam xuc va dinh vi ((dua tren) or (((cuu tre) or (cau treo))))*.