Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham duc » pham duc, pham duy, phan duc
sach thu » sach thue, sach thieu, sach tham
thu van » thuc van, thuy van, tu van
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
cua te » cua tu
van xa » van xay, van ha, dan xa

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 van xa hoi. hieu va ((cham duc) OR (cham soc)) va ((hanh di) OR (hanh kem)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach thu van xa hoi. hieu va ((cham duc) OR (cham soc)) va ((hanh di) or (hanh kem)) cua te~".
• Adding a wildcard symbol may retrieve word variants: hoc sach thu van xa hoi. hieu va ((cham duc) OR (cham soc)) va ((hanh di) or (hanh kem)) cua te*.