Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
su sach » vu sach
so sach » so sanh, bo sach, co sach
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
van cac » van hac, van cau, van bac
cac nop » cac hop, cac lop, cac nuoc
va hanh » van hanh, va thanh, va danh
cua duc » cua tuc, cua nuoc, cua quoc
nop va » hop va

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 sach) OR (so sach)) ty hang xa hoi. hieu van cac nop va hanh dai cua duc~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty hang xa hoi. hieu van cac nop va hanh dai cua duc*.