Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
su sach » vu sach
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
bac tuc » bac tu, bach tuoc, bac thua
xa hanh » xa thanh, xa khanh, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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)) ky nang x hoi. ((hieu van) OR (hieu va)) bac tuc xa hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang x hoi. ((hieu van) OR (hieu va)) bac tuc xa hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang x hoi. ((hieu van) OR (hieu va)) bac tuc xa hanh vai cua tre*.