Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
xay hoi » tay hoi, cay phoi, gay thoi
hieu va » lieu va, hieu qua
va cham » va chat, va tham
y dang » ky dang, 2 dang, _ dang
loc va » hoc va, luc va
vi cua » vai cua, di cua
cua te » cua tu

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 dang ((xay hoi) OR (xa hoi)). hieu va cham ((loc va) or (duc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y dang ((xay hoi) OR (xa hoi)). hieu va cham ((loc va) OR (duc va)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y dang ((xay hoi) OR (xa hoi)). hieu va cham ((loc va) or (duc va)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach y dang ((xay hoi) OR (xa hoi)). hieu va cham ((loc va) or (duc va)) hanh vi cua te*.