Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dai tren » dat tren, dau tren, dan tren
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
vuc van » duc van, luc van, thuc van
y mang » cay mang
va cau » van cau, va cac, va dau
vi dai » si dai, li dai, vien dai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y mang xa hoi. hieu va cau ((xuc van) OR (vuc van)) hanh vi dai tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y mang xa hoi. hieu va cau ((xuc van) OR (vuc van)) hanh vi dai tren".
• Adding a wildcard symbol may retrieve word variants: thu sach y mang xa hoi. hieu va cau ((xuc van) OR (vuc van)) hanh vi dai tren*.