Perhaps you should try some spelling variations:
co sach » bo sach, cuon sach, hoc sach
so sanh » do sanh
xang xa » lang xa, mang xa, ang xa
cua tre » cua te, cuu tre, cua triet
va cay » va cac, va cao, va cai
tuc va » thuc va, truc va, duc va
dao vi » dao voi, dao ve, dao va
vi cua » vai cua, di cua

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: ((co sach) OR (so sanh)) ty xang xa hoi. lieu va cay ((tuc va) OR (tuc xa)) dao vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) or (so sanh)) ty xang xa hoi. lieu va cay ((tuc va) OR (tuc xa)) dao vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((co sach) or (so sanh)) ty xang xa hoi. lieu va cay ((tuc va) OR (tuc xa)) dao vi cua tre*.