Perhaps you should try some spelling variations:
sach tham » sach nha
sach thu » sach thue, sach thieu, cach thuc
cham duc » pham duc, cham soc, pham duy
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
va cham » va chat, va tham
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
cua te » cua tu

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

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