Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
chau phi » chi phi, chau tho
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
la hanh » va hanh, lu hanh, ly hanh
cua tre » cua te, cuu tre, cua triet
phi la » phai la, phi va, phu la
vi cua » vai cua, di cua
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 ky nang x hoi. ((hieu van) OR (hieu va)) chau phi la hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. ((hieu van) or (hieu va)) chau phi la hanh vi cua tre*.