Perhaps you should try some spelling variations:
dau tren » dat tren, dau tieng, dau trong
dau tien » van tien
tu sach » thu sach, su sach, te sach
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
hanh bi » hanh vi, thanh bai, khanh bui
y xang » ty xang
va cau » van cau, va cac, va dau
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y xang xa hoi. hieu va cau ((xuc va) or (tuc va)) hanh bi ((dau tren) OR (dau tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y xang xa hoi. hieu va cau ((xuc va) OR (tuc va)) hanh bi ((dau tren) OR (dau tien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y xang xa hoi. hieu va cau ((xuc va) or (tuc va)) hanh bi ((dau tren) OR (dau tien))*".