Perhaps you should try some spelling variations:
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
xang xa » lang xa, mang xa, ang xa
cay tuc » cay thuc, cay thuoc, chay tui
cua tre » cua te, cuu tre, cua triet
va cay » va cac, va cao, va cai
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua

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