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
va cay » va cac, va cao, va cai
tuc va » thuc va, truc va, tuc xa
va dao » ca dao
vi cua » vai cua
di cua » dai cua, doi cua, de 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 dao ((vi cua) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty xang xa hoi. lieu va cay tuc va dao ((vi cua) OR (di 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 dao ((vi cua) OR (di cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ty xang xa hoi. lieu va cay tuc va dao ((vi cua) OR (di cua)) tre*.