Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
sach thu » sach thue, sach thieu, sach tham
cham cuc » cham cuu, pham cuc, pham chuc
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu van
cuc ban » cua ban, cac ban, cuu ban
hieu va » lieu va, hieu qua
cua te » cua tu
sac ky » cac ky, sai ky

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: su ((sac ky) OR (sach thu)) dang xa hoi. ((hieu ve) OR (hieu va)) cham cuc ban hanh dai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (sach thu)) dang xa hoi. ((hieu ve) OR (hieu va)) cham cuc ban hanh dai cua te~".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sach thu)) dang xa hoi. ((hieu ve) OR (hieu va)) cham cuc ban hanh dai cua te*.