Perhaps you should try some spelling variations:
chieu chien » thien chien
hieu hien » bieu hien, dieu hien, dieu khien
chua tre » chua tri, cua tre, chua trieu
ve chua » ve chuan, me chua, va chua
dinh ve » dinh ket, dinh van
va dinh » van dinh, va kinh, va tinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cac lao » cac loai, cac giao, cac lang
ca lao » cua lao, ca dao, ca cao
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 hien) OR (chieu chien)) ((cac lao) OR (ca lao)) va dinh ve chua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. ((hieu hien) or (chieu chien)) ((cac lao) OR (ca lao)) va dinh ve chua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. ((hieu hien) or (chieu chien)) ((cac lao) OR (ca lao)) va dinh ve chua tre*.