Perhaps you should try some spelling variations:
hieu hien » bieu hien, chieu chien, dieu khien
dieu hien » dieu khien, dieu kien, bieu hien
van tinh » van thinh, van minh, ban tinh
gia van » gian van, giay van, giai van
cua tre » cuu tre, cua triet, dua tren
tinh va » tich va, trinh van, trinh vat
tu sach » thu sach, su sach, te sach
cac gia » cac giai, cac giac, cac giao
sach ky » sac ky, sach y, sach ty
cua te » cua tu
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 ky nang x hoi. ((hieu hien) OR (dieu hien)) cac gia van tinh va ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. ((hieu hien) OR (dieu hien)) cac gia van tinh va ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((hieu hien) OR (dieu hien)) cac gia van tinh va ((cua tre) or (cua te))*.