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
van dinh » van minh, van dich, va dinh
su sach » so sach, vu sach
dinh vi » dinh ve, dinh viet, dinh tri
van cam » van nam, van lam, van cau
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau tren, cau treo
va 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: su sach tien ban ((va hoi) OR (xa hoi)). thien van cam xuc van dinh vi ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tien ban ((va hoi) OR (xa hoi)). thien van cam xuc van dinh vi ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tien ban ((va hoi) OR (xa hoi)). thien van cam xuc van dinh vi ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach tien ban ((va hoi) OR (xa hoi)). thien van cam xuc van dinh vi ((dua tren) or (cuu tre))*.