Perhaps you should try some spelling variations:
thien van » thi van
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
bac tuc » bac tu, bach tuoc, bac thua
van bac » van ban, van bao, van hac
vang xa » lang xa, mang xa, dang xay
cuu tre » cau tren, cau treo
ang xa » lang xa, mang xa, dang xay
tuc va » thuc va, truc va, tuc xa

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