Perhaps you should try some spelling variations:
chieu chien » thien chien
hieu hien » bieu hien, dieu hien, dieu khien
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac doi » cac dai, cac toi, cau doi
va dinh » van dinh, va kinh, va tinh
doi va » hoi va, noi va, dai va
van su » dan su

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 ky nang xa hoi. ((chieu chien) OR (hieu hien)) cac doi va dinh van su triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((chieu chien) or (hieu hien)) cac doi va dinh van su triet*.