Perhaps you should try some spelling variations:
thien van » thi van
su sach » so sach, vu sach
sach lo » sach dao, sach doi, sach hoi
cua tre » cua te, cua triet, dua tren
truc va » thuc va, thuc vat, trung va
cuu tre » cau tren, cau treo
van bac » van ban, van bao, van hac
vang xa » lang xa, mang xa, ang xa
lo vang » lo van, ly vang, hoa vang
tuc va » thuc va, tuc xa, duc va

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: su sach lo vang xa hoi. thien van bac ((tuc va) OR (truc va)) hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach lo vang xa hoi. thien van bac ((tuc va) OR (truc va)) hanh vi ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: su sach lo vang xa hoi. thien van bac ((tuc va) OR (truc va)) hanh vi ((cua tre) or (cuu tre))*.