Perhaps you should try some spelling variations:
tu cach » tu cac
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cap can » cap han, cap van, tap can
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
ca can » cua can, ca dan, ca cac
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 cach) OR (su sach)) ky nang x hoi. hieu va cau truc ((ca can) OR (cap can)) dai cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang x hoi. hieu va cau truc ((ca can) or (cap can)) dai cua tre*.