Perhaps you should try some spelling variations:
sach tien » sach tren, sach thieu
thien van » thi van
tien ban » thien ban, trien ban, dien ban
dua tren » dung tren
so sach » so sanh, bo sach, co sach
dinh vi » dinh ve, dinh viet, dinh tri
cuu tre » cua tre, cau tren, cau treo
luc van » luoc van, luu van, duc van
xuc van » duc van, vuc van, xuc ban
van cam » van nam, van lam, van cau
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 tien ban va hoi. thien van cam ((xuc van) or (luc van)) dinh vi ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tien ban va hoi. thien van cam ((xuc van) OR (luc van)) dinh vi ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: so sach tien ban va hoi. thien van cam ((xuc van) or (luc van)) dinh vi ((dua tren) or (cuu tre))*.