Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
te sach » toc sach
hieu ve » hieu va, hieu van
phuc va » thuc va, chuc va, thuc vat
cuu tre » cua tre, cau tren, cau treo
ve cau » ke cau, va cau, ve cac
vi cuu » vi luu, vinh cuu
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: ((tu sach) OR (te sach)) ky nang x hoi. hieu ve cau ((phuc va) OR (phuc vu)) hanh vi cuu tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang x hoi. hieu ve cau ((phuc va) or (phuc vu)) hanh vi cuu tre*.