Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thanh ve » hanh ve, thanh va, thanh vien
chau phu » chau phi, chau au, chau tho
van chau » van chat, van cau, van hau
ky lang » ky dang, ky tang, tay lang
phu ban » thu ban, phu san, pha ban
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (su sach)) ((ky lang) or (ky nang)) xa hoi. hieu van chau phu ban thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (su sach)) ((ky lang) OR (ky nang)) xa hoi. hieu van chau phu ban thanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (su sach)) ((ky lang) or (ky nang)) xa hoi. hieu van chau phu ban thanh ve cua tre*.